diff --git a/benchmarks/clustering/options/full_cal_reco.py b/benchmarks/clustering/options/full_cal_reco.py
index cd983a4bf9fb488552b620907a63d959974844de..24ef7bbe35411f49b9fe23463d00e2cfbf1f7da6 100644
--- a/benchmarks/clustering/options/full_cal_reco.py
+++ b/benchmarks/clustering/options/full_cal_reco.py
@@ -40,7 +40,6 @@ podioevent = EICDataSvc("EventDataSvc", inputs=input_sims)
 
 
 # juggler components
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__CalorimeterHitReco as CalHitReco
 from Configurables import Jug__Reco__CalorimeterHitsMerger as CalHitsMerger
@@ -67,8 +66,6 @@ sim_coll = [
 # input and output
 podin = PodioInput("PodioReader", collections=sim_coll)
 podout = PodioOutput("out", filename=output_rec)
-# copier needed to get around input --> output copy bug. So truth (mcparticles) can be saved in output file
-copier = MCCopier("MCCopier", inputCollection="mcparticles", outputCollection="mcparticles2")
 
 
 # Crystal Endcap Ecal
@@ -367,14 +364,14 @@ ce_hcal_clreco = RecoCoG("ce_hcal_clreco",
 
 
 podout.outputCommands = ['drop *',
-        'keep mcparticles2',
+        'keep mcparticles',
         'keep *Digi',
         'keep *Reco*',
         'keep *Cluster*',
         'keep *Layers']
 
 ApplicationMgr(
-    TopAlg = [podin, copier,
+    TopAlg = [podin,
               ce_ecal_digi, ce_ecal_reco, ce_ecal_cl, ce_ecal_clreco,
               ci_ecal_digi, ci_ecal_reco, ci_ecal_merger, ci_ecal_cl, ci_ecal_clreco,
               cb_ecal_digi, cb_ecal_reco, cb_ecal_cl, cb_ecal_clreco,
diff --git a/benchmarks/clustering/scripts/deprecated/barrel_clusters.cxx b/benchmarks/clustering/scripts/deprecated/barrel_clusters.cxx
index 8968d48d635e042b5ba76b8e1871a74167c8e956..5720c7ea3fa19f07154a41e325bd508c368e645e 100644
--- a/benchmarks/clustering/scripts/deprecated/barrel_clusters.cxx
+++ b/benchmarks/clustering/scripts/deprecated/barrel_clusters.cxx
@@ -91,8 +91,8 @@ int barrel_clusters(const char* in_fname = "topside/rec_barrel_clusters.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", in_fname);
 
-  auto d0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto d0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                .Define("thrownParticles", "mcparticles[isThrown]")
                 .Define("thrownP", fourvec, {"thrownParticles"})
                 .Define("thrownEta", eta, {"thrownParticles"})
                 .Define("thrownTheta", theta, {"thrownP"})
diff --git a/benchmarks/ecal/options/barrel.py b/benchmarks/ecal/options/barrel.py
index 58b7bef2651dd2b20e026f63271415323160a72a..1919fbf045a3012995163a88ff54f4405f27729b 100644
--- a/benchmarks/ecal/options/barrel.py
+++ b/benchmarks/ecal/options/barrel.py
@@ -31,7 +31,6 @@ podioevent = EICDataSvc("EventDataSvc", inputs=input_sims)
 
 
 # juggler components
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__ImagingPixelReco as ImCalPixelReco
 from Configurables import Jug__Reco__ImagingTopoCluster as ImagingCluster
@@ -46,8 +45,6 @@ sim_coll = [
 # input and output
 podin = PodioInput("PodioReader", collections=sim_coll)
 podout = PodioOutput("out", filename=output_rec)
-# copier needed to get around input --> output copy bug. So truth (mcparticles) can be saved in output file
-copier = MCCopier("MCCopier", inputCollection="mcparticles", outputCollection="mcparticles2")
 
 
 # Central Barrel Ecal (Imaging Cal.)
@@ -89,13 +86,13 @@ cb_ecal_clreco = ImagingClusterReco("cb_ecal_clreco",
         mcHits="EcalBarrelHits")
 
 podout.outputCommands = ['drop *',
-        'keep mcparticles2',
+        'keep mcparticles',
         'keep *HitsReco',
         'keep *HitsDigi',
         'keep *Cluster*']
 
 ApplicationMgr(
-    TopAlg = [podin, copier,
+    TopAlg = [podin,
               cb_ecal_digi, cb_ecal_reco, cb_ecal_cl, cb_ecal_clreco,
               podout],
     EvtSel = 'NONE',
diff --git a/benchmarks/ecal/options/endcap_e.py b/benchmarks/ecal/options/endcap_e.py
index 5a29973b57f85970a8b6eef33dd1a6a1cce1ccc9..9eb12ffe8f34848c95a17a8e6bce8354ca014ab8 100644
--- a/benchmarks/ecal/options/endcap_e.py
+++ b/benchmarks/ecal/options/endcap_e.py
@@ -24,7 +24,6 @@ podioevent = EICDataSvc("EventDataSvc", inputs=input_sims)
 
 
 # juggler components
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__CalorimeterHitReco as CalHitReco
 from Configurables import Jug__Reco__CalorimeterIslandCluster as IslandCluster
@@ -39,8 +38,6 @@ sim_coll = [
 # input and output
 podin = PodioInput("PodioReader", collections=sim_coll)
 podout = PodioOutput("out", filename=output_rec)
-# copier needed to get around input --> output copy bug. So truth (mcparticles) can be saved in output file
-copier = MCCopier("MCCopier", inputCollection="mcparticles", outputCollection="mcparticles2")
 
 
 # Crystal Endcap Ecal
@@ -83,13 +80,13 @@ ce_ecal_clreco = RecoCoG("ce_ecal_clreco",
         logWeightBase=4.6)
 
 podout.outputCommands = ['drop *',
-        'keep mcparticles2',
+        'keep mcparticles',
         'keep *HitsReco',
         'keep *HitsDigi',
         'keep *Cluster*']
 
 ApplicationMgr(
-    TopAlg = [podin, copier,
+    TopAlg = [podin,
               ce_ecal_digi, ce_ecal_reco, ce_ecal_cl, ce_ecal_clreco,
               podout],
     EvtSel = 'NONE',
diff --git a/benchmarks/ecal/options/endcap_i.py b/benchmarks/ecal/options/endcap_i.py
index 1a7fd34280ae30c6bccd98486423eac426087069..aaa00dc7145735456441e98dc29e0a0b762b67c1 100644
--- a/benchmarks/ecal/options/endcap_i.py
+++ b/benchmarks/ecal/options/endcap_i.py
@@ -26,7 +26,6 @@ podioevent = EICDataSvc("EventDataSvc", inputs=input_sims)
 
 
 # juggler components
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__CalorimeterHitReco as CalHitReco
 from Configurables import Jug__Reco__CalorimeterHitsMerger as CalHitsMerger
@@ -42,8 +41,6 @@ sim_coll = [
 # input and output
 podin = PodioInput("PodioReader", collections=sim_coll)
 podout = PodioOutput("out", filename=output_rec)
-# copier needed to get around input --> output copy bug. So truth (mcparticles) can be saved in output file
-copier = MCCopier("MCCopier", inputCollection="mcparticles", outputCollection="mcparticles2")
 
 
 # Endcap sampling Ecal
@@ -92,13 +89,13 @@ ci_ecal_clreco = RecoCoG("ci_ecal_clreco",
         samplingFraction=ci_ecal_sf)
 
 podout.outputCommands = ['drop *',
-        'keep mcparticles2',
+        'keep mcparticles',
         'keep *HitsReco*',
         'keep *HitsDigi',
         'keep *Cluster*']
 
 ApplicationMgr(
-    TopAlg = [podin, copier,
+    TopAlg = [podin,
               ci_ecal_digi, ci_ecal_reco, ci_ecal_merger, ci_ecal_cl, ci_ecal_clreco,
               podout],
     EvtSel = 'NONE',
diff --git a/benchmarks/far_forward/analysis/rec_far_forward_protons.cxx b/benchmarks/far_forward/analysis/rec_far_forward_protons.cxx
index a12c2d4059d87213d4ae8ca2f79b61d15e872041..9e0ae6b8c8dfdcd7e4cfde904fd5ea21c9219fd6 100644
--- a/benchmarks/far_forward/analysis/rec_far_forward_protons.cxx
+++ b/benchmarks/far_forward/analysis/rec_far_forward_protons.cxx
@@ -86,8 +86,8 @@ int rec_far_forward_protons(const char* fname = "topside/rec_far_forward_protons
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/far_forward/options/far_forward_reconstruction.py b/benchmarks/far_forward/options/far_forward_reconstruction.py
index 0a28e70b8e5d8dcd500a7c3b33c8aa7f0e130c3b..7145ae962adcaeab3301bd84b21a445593f4774c 100644
--- a/benchmarks/far_forward/options/far_forward_reconstruction.py
+++ b/benchmarks/far_forward/options/far_forward_reconstruction.py
@@ -26,7 +26,6 @@ from Configurables import Jug__Reco__FarForwardParticles as FarForwardParticles
 
 from Configurables import Jug__Reco__TrackFindingAlgorithm as TrackFindingAlgorithm
 from Configurables import Jug__Reco__ParticlesFromTrackFit as ParticlesFromTrackFit
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 
 from Configurables import Jug__Reco__TrackerHitReconstruction as TrackerHitReconstruction
 
@@ -44,12 +43,6 @@ algorithms = []
 podin = PodioInput("PodioReader", collections=sim_colls)
 algorithms.append(podin)
 
-## copiers to get around input --> output copy bug. Note the "2" appended to the output collection.
-mccopier = MCCopier("MCCopier",
-        inputCollection="mcparticles",
-        outputCollection="mcparticles2")
-algorithms.append(mccopier)
-
 ## Roman pots
 ffi_romanpot_digi = TrackerDigi("ffi_romanpot_digi",
         inputHitCollection = "ForwardRomanPotHits",
@@ -134,7 +127,7 @@ podout.outputCommands = [
     "drop trajectories",
     "drop outputSourceLinks",
     "drop outputInitialTrackParameters",
-    "drop mcparticles",
+    "keep mcparticles",
 ]
 algorithms.append(podout)
 
diff --git a/benchmarks/imaging_ecal/options/hybrid_cluster.py b/benchmarks/imaging_ecal/options/hybrid_cluster.py
index 295be3918b2e918c0c4d62b70dcd60ead41221f1..223b61696e2e457084fc9939b6fe51fbcec8f765 100644
--- a/benchmarks/imaging_ecal/options/hybrid_cluster.py
+++ b/benchmarks/imaging_ecal/options/hybrid_cluster.py
@@ -6,7 +6,6 @@ from GaudiKernel.SystemOfUnits import MeV, mm, cm, mrad, rad, ns
 from Configurables import ApplicationMgr, EICDataSvc, PodioOutput, GeoSvc
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__CalorimeterHitReco as CalHitReco
 from Configurables import Jug__Reco__CalorimeterHitsMerger as CalHitsMerger
@@ -50,11 +49,6 @@ sim_colls = [
 podin = PodioInput('PodioReader', collections=sim_colls, OutputLevel=DEBUG)
 podout = PodioOutput('podout', filename=kwargs['output'])
 
-mccopier = MCCopier('MCCopier',
-        # OutputLevel=DEBUG,
-        inputCollection='mcparticles',
-        outputCollection='mcparticles2')
-
 # use the same daq_setting for digi/reco pair
 imcaldaq = dict(
         dynamicRangeADC=3*MeV,
@@ -145,7 +139,7 @@ scfi_barrel_clreco = RecoCoG("scfi_barrel_clreco",
 # TODO: merge two types of clusters
 
 podout.outputCommands = ['drop *',
-        'keep mcparticles2',
+        'keep mcparticles',
         'keep *Reco*',
         'keep *Digi*',
         'keep *Cluster*',
@@ -153,7 +147,7 @@ podout.outputCommands = ['drop *',
         ]
 
 ApplicationMgr(
-    TopAlg=[podin, mccopier,
+    TopAlg=[podin,
         imcaldigi, imcalreco, imcalcluster, clusterreco,
         scfi_barrel_digi, scfi_barrel_reco, scfi_barrel_merger, scfi_barrel_cl, scfi_barrel_clreco,
         podout],
diff --git a/benchmarks/imaging_ecal/options/imaging_2dcluster.py b/benchmarks/imaging_ecal/options/imaging_2dcluster.py
index 9374a8f70bcbbde9b56f4dcee406186b4adb3571..b4ac4a6d8c336f4b92c8b81aab7aac2f590699d1 100644
--- a/benchmarks/imaging_ecal/options/imaging_2dcluster.py
+++ b/benchmarks/imaging_ecal/options/imaging_2dcluster.py
@@ -6,7 +6,6 @@ from GaudiKernel.SystemOfUnits import mm, MeV, rad, ns
 from Configurables import ApplicationMgr, EICDataSvc, PodioOutput, GeoSvc
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalHitDigi
 from Configurables import Jug__Reco__CalorimeterHitReco as CalHitReco
 from Configurables import Jug__Reco__CalorimeterHitsEtaPhiProjector as CalHitsProj
@@ -39,11 +38,6 @@ podin = PodioInput('PodioReader', collections=['mcparticles', 'EcalBarrelHits'],
 podout = PodioOutput('out', filename=kwargs['output'])
 
 
-mccopier = MCCopier('MCCopier',
-        # OutputLevel=DEBUG,
-        inputCollection='mcparticles',
-        outputCollection='mcparticles2')
-
 # use the same daq_setting for digi/reco pair
 imcal_barrel_daq = dict(
         dynamicRangeADC=3.*MeV,
@@ -93,7 +87,7 @@ imcal_barrel_clreco = RecoCoG('imcal_barrel_clreco',
 podout.outputCommands = ['keep *']
 
 ApplicationMgr(
-    TopAlg=[podin, mccopier,
+    TopAlg=[podin,
         imcal_barrel_digi, imcal_barrel_reco,
         imcal_barrel_merger, imcal_barrel_cl, imcal_barrel_clreco,
         podout],
diff --git a/benchmarks/imaging_ecal/options/imaging_topocluster.py b/benchmarks/imaging_ecal/options/imaging_topocluster.py
index a42c3a107217db50b312afb721c07192d37fd404..fe243a1876a053d184ee0f3685a2d29bacff59ee 100644
--- a/benchmarks/imaging_ecal/options/imaging_topocluster.py
+++ b/benchmarks/imaging_ecal/options/imaging_topocluster.py
@@ -7,8 +7,6 @@ from GaudiKernel import SystemOfUnits as units
 from Configurables import ApplicationMgr, EICDataSvc, PodioOutput, GeoSvc
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__CalorimeterHitCollection_dd4pod__CalorimeterHitCollection_ as CalCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalorimeterHitDigi
 from Configurables import Jug__Reco__ImagingPixelReco as ImagingPixelReco
 from Configurables import Jug__Reco__ImagingTopoCluster as ImagingTopoCluster
@@ -40,15 +38,6 @@ out = PodioOutput("out", filename=kwargs['output'])
 
 podioinput = PodioInput("PodioReader", collections=["mcparticles", "EcalBarrelHits"], OutputLevel=DEBUG)
 
-copier = MCCopier("MCCopier",
-        # OutputLevel=DEBUG,
-        inputCollection="mcparticles",
-        outputCollection="mcparticles2")
-calcopier = CalCopier("CalCopier",
-        # OutputLevel=DEBUG,
-        inputCollection="EcalBarrelHits",
-        outputCollection="EcalBarrelHits2")
-
 # use the same daq_setting for digi/reco pair
 daq_setting = dict(
         dynamicRangeADC=3*units.MeV,
@@ -91,7 +80,7 @@ clusterreco = ImagingClusterReco("imcal_clreco",
 out.outputCommands = ["keep *"]
 
 ApplicationMgr(
-    TopAlg=[podioinput, copier, calcopier, imcaldigi, imcalreco, imcalcluster, clusterreco, out],
+    TopAlg=[podioinput, imcaldigi, imcalreco, imcalcluster, clusterreco, out],
     EvtSel='NONE',
     EvtMax=kwargs['nev'],
     ExtSvc=[podioevent],
diff --git a/benchmarks/imaging_ecal/scripts/draw_cluster.py b/benchmarks/imaging_ecal/scripts/draw_cluster.py
index 6dedc2f64ea9eba73f2ae2cbfbb4922c99de372f..6ad5c05a8a4de79cceda1b2ef032fb294188df85 100644
--- a/benchmarks/imaging_ecal/scripts/draw_cluster.py
+++ b/benchmarks/imaging_ecal/scripts/draw_cluster.py
@@ -148,7 +148,7 @@ if __name__ == '__main__':
     df['eta'] = -np.log(np.tan(df['theta'].values/1000./2.))
 
     # Read all mc particles
-    dfallmcp = get_all_mcp(args.file, args.iev, 'mcparticles2')
+    dfallmcp = get_all_mcp(args.file, args.iev, 'mcparticles')
     pdgbase = ROOT.TDatabasePDG()
     # Select decaying particles
     dftemp = dfallmcp[dfallmcp['g4Parent'] == 1.0]
@@ -165,7 +165,7 @@ if __name__ == '__main__':
         dfdecaymcp['eta'] = -np.log(np.tan(dfdecaymcp['theta'].values/1000./2.))
 
     # truth
-    dfmcp = get_mcp_simple(args.file, args.iev, 'mcparticles2').iloc[0]
+    dfmcp = get_mcp_simple(args.file, args.iev, 'mcparticles').iloc[0]
     #pdgbase = ROOT.TDatabasePDG()
     inpart = pdgbase.GetParticle(int(dfmcp['pid']))
     print("Incoming particle = {}, pdgcode = {}, charge = {}, mass = {}"\
diff --git a/benchmarks/imaging_ecal/scripts/draw_cluster_layers.py b/benchmarks/imaging_ecal/scripts/draw_cluster_layers.py
index b0a06b12e799bad55313db031027a38d1c95cf11..89578104ae8408eb77bb74910b584d6a0b32575a 100644
--- a/benchmarks/imaging_ecal/scripts/draw_cluster_layers.py
+++ b/benchmarks/imaging_ecal/scripts/draw_cluster_layers.py
@@ -98,7 +98,7 @@ if __name__ == '__main__':
     df['eta'] = -np.log(np.tan(df['theta'].values/1000./2.))
 
     # truth
-    dfmcp = get_mcp_simple(args.file, args.iev, 'mcparticles2').iloc[0]
+    dfmcp = get_mcp_simple(args.file, args.iev, 'mcparticles').iloc[0]
     pdgbase = ROOT.TDatabasePDG()
     inpart = pdgbase.GetParticle(int(dfmcp['pid']))
     print("Incoming particle = {}, pdgcode = {}, charge = {}, mass = {}"\
diff --git a/benchmarks/imaging_ecal/scripts/utils.py b/benchmarks/imaging_ecal/scripts/utils.py
index 51f48c4ae860367dc3d5d122db2ef6790b0d2679..0f4e40a239a6aced7430162e11f932a8bffab05a 100644
--- a/benchmarks/imaging_ecal/scripts/utils.py
+++ b/benchmarks/imaging_ecal/scripts/utils.py
@@ -37,7 +37,7 @@ def load_root_macros(arg_macros):
 
 
 # read mc particles from root file
-def get_mcp_data(path, evnums=None, branch='mcparticles2'):
+def get_mcp_data(path, evnums=None, branch='mcparticles'):
     f = ROOT.TFile(path)
     events = f.events
     if evnums is None:
@@ -61,7 +61,7 @@ def get_mcp_data(path, evnums=None, branch='mcparticles2'):
 
 
 # read mc particles from root file
-def get_mcp_simple(path, evnums=None, branch='mcparticles2'):
+def get_mcp_simple(path, evnums=None, branch='mcparticles'):
     f = ROOT.TFile(path)
     events = f.events
     if evnums is None:
@@ -86,7 +86,7 @@ def get_mcp_simple(path, evnums=None, branch='mcparticles2'):
 #######################################
 # read all mc particles from root file
 #######################################
-def get_all_mcp(path, evnums=None, branch='mcparticles2'):
+def get_all_mcp(path, evnums=None, branch='mcparticles'):
     f = ROOT.TFile(path)
     events = f.events
     if evnums is None:
diff --git a/benchmarks/imaging_shower_ML/options/imaging_ml_data.py b/benchmarks/imaging_shower_ML/options/imaging_ml_data.py
index 7cf239564edd407c91af246f379a3d0bec8e9adb..22c87d9d042d3d6f7f037b7da3d342038a1d0723 100644
--- a/benchmarks/imaging_shower_ML/options/imaging_ml_data.py
+++ b/benchmarks/imaging_shower_ML/options/imaging_ml_data.py
@@ -6,7 +6,6 @@ from GaudiKernel import SystemOfUnits as units
 from Configurables import ApplicationMgr, EICDataSvc, PodioOutput, GeoSvc
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
 from Configurables import Jug__Digi__CalorimeterHitDigi as CalorimeterHitDigi
 from Configurables import Jug__Reco__ImagingPixelReco as ImagingPixelReco
 from Configurables import Jug__Reco__ImagingPixelMerger as ImagingPixelMerger
@@ -35,10 +34,6 @@ podev = EICDataSvc('EventDataSvc', inputs=[f.strip() for f in kwargs['input'].sp
 podin = PodioInput('PodioReader', collections=['mcparticles', 'EcalBarrelHits'])
 podout = PodioOutput('out', filename=kwargs['output'])
 
-copier = MCCopier('MCCopier',
-        OutputLevel=DEBUG,
-        inputCollection='mcparticles',
-        outputCollection='mcparticles2')
 imcaldigi = CalorimeterHitDigi('imcal_digi',
         inputHitCollection='EcalBarrelHits',
         outputHitCollection='EcalBarrelHitsDigi',
@@ -66,7 +61,7 @@ imcaldata = ImagingPixelMerger('imcal_merger',
 podout.outputCommands = ['keep *']
 
 ApplicationMgr(
-    TopAlg=[podin, copier, imcaldigi, imcalreco, imcaldata, podout],
+    TopAlg=[podin, imcaldigi, imcalreco, imcaldata, podout],
     EvtSel='NONE',
     EvtMax=kwargs['nev'],
     ExtSvc=[podev],
diff --git a/benchmarks/imaging_shower_ML/scripts/prepare_tf_dataset.py b/benchmarks/imaging_shower_ML/scripts/prepare_tf_dataset.py
index 9355b5d94299f26735bdffb25f4dfb0778df1ccb..ea5ac2a1ce5091689acc0c072fc07c8a2706b846 100644
--- a/benchmarks/imaging_shower_ML/scripts/prepare_tf_dataset.py
+++ b/benchmarks/imaging_shower_ML/scripts/prepare_tf_dataset.py
@@ -31,7 +31,7 @@ def get_ml_data(path, evnums=None, shape=(20, 20, 3), branch='EcalBarrelHitsML')
 
 # execute this script
 # read mc particles from root file
-def get_mcp_simple(path, evnums=None, branch='mcparticles2'):
+def get_mcp_simple(path, evnums=None, branch='mcparticles'):
     f = ROOT.TFile(path)
     events = f.events
     if evnums is None:
@@ -83,7 +83,7 @@ if __name__ == '__main__':
     os.makedirs(args.outdir, exist_ok=True)
     load_root_macros(args.macros)
     data = get_ml_data(args.file, shape=[int(i.strip()) for i in args.shape.split(',')])
-    dfmcp = get_mcp_simple(args.file, branch='mcparticles2')
+    dfmcp = get_mcp_simple(args.file, branch='mcparticles')
     # dfmcp = dfmcp[dfmcp['status'] == 24578]
     dfmcp.loc[:, 'p'] = np.linalg.norm(dfmcp[['px', 'py', 'pz']].values, axis=1)
     dfmcp['phi'] = np.arctan2(dfmcp['py'].values, dfmcp['px'].values)
diff --git a/benchmarks/rich/options/rich_reco.py b/benchmarks/rich/options/rich_reco.py
index edf86520ecda033afe05918c548487c150673080..43a3d4bc39b101fd26b99776d5529df2739d7b86 100644
--- a/benchmarks/rich/options/rich_reco.py
+++ b/benchmarks/rich/options/rich_reco.py
@@ -22,15 +22,8 @@ from Configurables import Jug__Digi__PhotoMultiplierDigi as PhotoMultiplierDigi
 from Configurables import Jug__Reco__PhotoMultiplierReco as PhotoMultiplierReco
 from Configurables import Jug__Reco__PhotoRingClusters as PhotoRingClusters
 
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__PhotoMultiplierHitCollection_dd4pod__PhotoMultiplierHitCollection_ as PMTCopier
-
 qe_data = [(1.0, 0.25), (7.5, 0.25),]
 podioinput = PodioInput("PodioReader", collections=["mcparticles", "ForwardRICHHits"], OutputLevel=DEBUG)
-## copiers to get around input --> output copy bug. Note the "2" appended to the output collection.
-# copy these inputs to the output (a bug work around for now...). Note the the output name has a "2" at the end. 
-copier = MCCopier("MCCopier", inputCollection="mcparticles", outputCollection="mcparticles2",OutputLevel=DEBUG) 
-pmtcopier = PMTCopier("PMTCopier", inputCollection="ForwardRICHHits", outputCollection="ForwardRICHHits2",OutputLevel=DEBUG) 
 
 pmtdigi = PhotoMultiplierDigi(inputHitCollection="ForwardRICHHits", outputHitCollection="DigiForwardRICHHits",
                               quantumEfficiency=[(a*units.eV, b) for a, b in qe_data])
@@ -42,7 +35,7 @@ out = PodioOutput("out", filename=output_rec_file)
 out.outputCommands = ["keep *"]
 
 ApplicationMgr(
-    TopAlg = [podioinput, copier, pmtcopier, pmtdigi, pmtreco, richcluster, out],
+    TopAlg = [podioinput, pmtdigi, pmtreco, richcluster, out],
     EvtSel = 'NONE',
     EvtMax = n_events,
     ExtSvc = [podioevent],
diff --git a/benchmarks/track_finding/options/track_reconstruction.py b/benchmarks/track_finding/options/track_reconstruction.py
index 0831e95fcdbf9233a251859f1051cc316a50e4bd..1b428cc452275893d9fe9c4d04dbaf61b6eb93c3 100644
--- a/benchmarks/track_finding/options/track_reconstruction.py
+++ b/benchmarks/track_finding/options/track_reconstruction.py
@@ -20,9 +20,6 @@ geo_service  = GeoSvc("GeoSvc", detectors=["{}/{}.xml".format(detector_path,dete
 podioevent   = EICDataSvc("EventDataSvc", inputs=[input_sim_file], OutputLevel=WARNING)
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__CalorimeterHitCollection_dd4pod__CalorimeterHitCollection_ as CalCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__TrackerHitCollection_dd4pod__TrackerHitCollection_ as TrkCopier
 
 from Configurables import Jug__Digi__SiliconTrackerDigi as TrackerDigi
 
@@ -47,17 +44,6 @@ podioinput = PodioInput("PodioReader",
                         collections=["mcparticles","TrackerEndcapHits","TrackerBarrelHits","VertexBarrelHits","VertexEndcapHits","GEMTrackerEndcapHits"])
 algorithms.append( podioinput )
 
-## copiers to get around input --> output copy bug. Note the "2" appended to the output collection.
-copier = MCCopier("MCCopier", 
-        inputCollection="mcparticles", 
-        outputCollection="mcparticles2") 
-algorithms.append( copier )
-
-trkcopier = TrkCopier("TrkCopier", 
-        inputCollection="TrackerBarrelHits", 
-        outputCollection="TrackerBarrelHits2") 
-algorithms.append( trkcopier )
-
 trk_b_digi = TrackerDigi("trk_b_digi", 
         inputHitCollection="TrackerBarrelHits",
         outputHitCollection="TrackerBarrelRawHits",
@@ -188,7 +174,7 @@ out.outputCommands = ["keep *",
         "drop trajectories",
         "drop outputSourceLinks",
         "drop outputInitialTrackParameters",
-        "drop mcparticles"
+        "keep mcparticles"
         ]
 algorithms.append(out)
 
diff --git a/benchmarks/track_finding/scripts/rec_multiple_tracks.cxx b/benchmarks/track_finding/scripts/rec_multiple_tracks.cxx
index 788b9e2a54964b742b6000b5553b4fdaddf79fb5..9b3e551205fed66a47e04e54e3ac2193202d8659 100644
--- a/benchmarks/track_finding/scripts/rec_multiple_tracks.cxx
+++ b/benchmarks/track_finding/scripts/rec_multiple_tracks.cxx
@@ -87,8 +87,8 @@ int rec_multiple_tracks(const char* fname = "topside/rec_multiple_tracks.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("nThrown", "thrownParticles.size()")
                  .Define("nProto", "outputProtoTracks.size()")
diff --git a/benchmarks/track_fitting/options/track_reconstruction.py b/benchmarks/track_fitting/options/track_reconstruction.py
index b46c8804d028d6b2bee0cda3765d6e733e4dadef..fa6613a18b97d2cc0daeb5caa1ab4c2d8dc0c091 100644
--- a/benchmarks/track_fitting/options/track_reconstruction.py
+++ b/benchmarks/track_fitting/options/track_reconstruction.py
@@ -20,9 +20,6 @@ geo_service  = GeoSvc("GeoSvc", detectors=["{}/{}.xml".format(detector_path,dete
 podioevent   = EICDataSvc("EventDataSvc", inputs=[input_sim_file], OutputLevel=WARNING)
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__CalorimeterHitCollection_dd4pod__CalorimeterHitCollection_ as CalCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__TrackerHitCollection_dd4pod__TrackerHitCollection_ as TrkCopier
 
 from Configurables import Jug__Digi__SiliconTrackerDigi as TrackerDigi
 
@@ -47,17 +44,6 @@ podioinput = PodioInput("PodioReader",
                         collections=["mcparticles","TrackerEndcapHits","TrackerBarrelHits","VertexBarrelHits","VertexEndcapHits","GEMTrackerEndcapHits"])#, OutputLevel=DEBUG)
 algorithms.append( podioinput )
 
-## copiers to get around input --> output copy bug. Note the "2" appended to the output collection.
-copier = MCCopier("MCCopier", 
-        inputCollection="mcparticles", 
-        outputCollection="mcparticles2") 
-algorithms.append( copier )
-
-trkcopier = TrkCopier("TrkCopier", 
-        inputCollection="TrackerBarrelHits", 
-        outputCollection="TrackerBarrelHits2") 
-algorithms.append( trkcopier )
-
 trk_b_digi = TrackerDigi("trk_b_digi", 
         inputHitCollection="TrackerBarrelHits",
         outputHitCollection="TrackerBarrelRawHits",
@@ -180,7 +166,7 @@ out.outputCommands = ["keep *",
         "drop trajectories",
         "drop outputSourceLinks",
         "drop outputInitialTrackParameters",
-        "drop mcparticles"
+        "keep mcparticles"
         ]
 algorithms.append(out)
 
diff --git a/benchmarks/track_fitting/scripts/rec_multiple_tracks.cxx b/benchmarks/track_fitting/scripts/rec_multiple_tracks.cxx
index 02bd77de9c2f6596303874e0a03c0ab4378e5ec1..ada976a32d3f7af3c1f8762cb14bd729d8424c3e 100644
--- a/benchmarks/track_fitting/scripts/rec_multiple_tracks.cxx
+++ b/benchmarks/track_fitting/scripts/rec_multiple_tracks.cxx
@@ -84,8 +84,8 @@ int rec_multiple_tracks(const char* fname = "topside/rec_multiple_tracks.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/track_fitting/scripts/rec_single_tracks.cxx b/benchmarks/track_fitting/scripts/rec_single_tracks.cxx
index 20c42392501859c59c465c5f9059175748fd3d7e..9aad6734df65ecd7fc0dec19ab4484addfefe63a 100644
--- a/benchmarks/track_fitting/scripts/rec_single_tracks.cxx
+++ b/benchmarks/track_fitting/scripts/rec_single_tracks.cxx
@@ -87,8 +87,8 @@ int rec_single_tracks(const char* fname = "topside/rec_single_tracks.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/tracking/central_electrons.sh b/benchmarks/tracking/central_electrons.sh
index 0a278d96714ae189165c4825947261001a3f7323..1c0fe1bab7fec1a4613b41cd9e443f147cfd6b64 100644
--- a/benchmarks/tracking/central_electrons.sh
+++ b/benchmarks/tracking/central_electrons.sh
@@ -97,7 +97,7 @@ rootls -t ${JUGGLER_SIM_FILE}
 if [[ -z "${ANALYSIS_ONLY}" ]] ;
 then
   # Need to figure out how to pass file name to juggler from the commandline
-  xenv -x ${JUGGLER_INSTALL_PREFIX}/Juggler.xenv gaudirun.py benchmarks/tracking/options/track_reconstruction.py
+  gaudirun.py benchmarks/tracking/options/track_reconstruction.py
   if [[ "$?" -ne "0" ]] ; then
     echo "ERROR running juggler"
     exit 1
diff --git a/benchmarks/tracking/options/track_reconstruction.py b/benchmarks/tracking/options/track_reconstruction.py
index 764659b7719d21d84165f70ae944d19a5e484596..27430cf316af6c32ffb715ddc9963f44d61d61a0 100644
--- a/benchmarks/tracking/options/track_reconstruction.py
+++ b/benchmarks/tracking/options/track_reconstruction.py
@@ -20,9 +20,6 @@ geo_service  = GeoSvc("GeoSvc", detectors=["{}/{}.xml".format(detector_path,dete
 podioevent   = EICDataSvc("EventDataSvc", inputs=[input_sim_file], OutputLevel=WARNING)
 
 from Configurables import PodioInput
-from Configurables import Jug__Base__InputCopier_dd4pod__Geant4ParticleCollection_dd4pod__Geant4ParticleCollection_ as MCCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__CalorimeterHitCollection_dd4pod__CalorimeterHitCollection_ as CalCopier
-from Configurables import Jug__Base__InputCopier_dd4pod__TrackerHitCollection_dd4pod__TrackerHitCollection_ as TrkCopier
 
 from Configurables import Jug__Digi__SiliconTrackerDigi as TrackerDigi
 
@@ -47,17 +44,6 @@ podioinput = PodioInput("PodioReader",
                         collections=["mcparticles","TrackerEndcapHits","TrackerBarrelHits","VertexBarrelHits","VertexEndcapHits","GEMTrackerEndcapHits"])#, OutputLevel=DEBUG)
 algorithms.append( podioinput )
 
-## copiers to get around input --> output copy bug. Note the "2" appended to the output collection.
-copier = MCCopier("MCCopier", 
-        inputCollection="mcparticles", 
-        outputCollection="mcparticles2") 
-algorithms.append( copier )
-
-trkcopier = TrkCopier("TrkCopier", 
-        inputCollection="TrackerBarrelHits", 
-        outputCollection="TrackerBarrelHits2") 
-algorithms.append( trkcopier )
-
 trk_b_digi = TrackerDigi("trk_b_digi", 
         inputHitCollection="TrackerBarrelHits",
         outputHitCollection="TrackerBarrelRawHits",
@@ -186,7 +172,7 @@ out.outputCommands = ["keep *",
         "drop trajectories",
         "drop outputSourceLinks",
         "drop outputInitialTrackParameters",
-        "drop mcparticles"
+        "keep mcparticles"
         ]
 algorithms.append(out)
 
diff --git a/benchmarks/tracking/run_tracking_benchmarks.py b/benchmarks/tracking/run_tracking_benchmarks.py
index cc65ad6339fd19e8c90d354622c8f27fbe409f54..f474dadaccbb16cad8c3a389f849cac6b14cd660 100755
--- a/benchmarks/tracking/run_tracking_benchmarks.py
+++ b/benchmarks/tracking/run_tracking_benchmarks.py
@@ -80,9 +80,7 @@ if 'rec' in procs:
     os.environ['JUGGLER_COMPACT_PATH'] = args.compact
     os.environ['JUGGLER_N_EVENTS'] = '{}'.format(args.nev)
 
-    juggler_xenv = os.path.join(os.environ.get('JUGGLER_INSTALL_PREFIX', '../local'), 'Juggler.xenv')
-
-    rec_cmd = ['xenv', '-x', juggler_xenv, 'gaudirun.py', os.path.join(sdir, 'options', option_script)]
+    rec_cmd = ['gaudirun.py', os.path.join(sdir, 'options', option_script)]
     return_code = subprocess.run(rec_cmd).returncode
     if return_code is not None and return_code != 0:
         print('ERROR running juggler ({})!'.format(opt))
@@ -93,7 +91,7 @@ if 'rec' in procs:
 if 'ana' in procs:
     os.makedirs('results', exist_ok=True)
     ana_cmd = ['python', analysis_script, rec_file,
-               '--mc-collection', 'mcparticles2',
+               '--mc-collection', 'mcparticles',
                '--tracking-collection', 'outputTrackParameters',
                '-o', 'results', '-t', args.nametag]
     return_code = subprocess.run(ana_cmd).returncode
diff --git a/benchmarks/tracking/scripts/rec_central_electrons.cxx b/benchmarks/tracking/scripts/rec_central_electrons.cxx
index 9bb12315020e3c8e8e1a62b8a2b7c3258e9e6533..8c3708f1c52d9d08b65dd53e52188176f94512a1 100644
--- a/benchmarks/tracking/scripts/rec_central_electrons.cxx
+++ b/benchmarks/tracking/scripts/rec_central_electrons.cxx
@@ -84,8 +84,8 @@ int rec_central_electrons(const char* fname = "topside/rec_central_electrons.roo
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/tracking/scripts/rec_central_pions.cxx b/benchmarks/tracking/scripts/rec_central_pions.cxx
index f761b66f9399c00a312c5df73a485181a3445982..516ecb2b315252dd495878472f0d8b58f9fab00a 100644
--- a/benchmarks/tracking/scripts/rec_central_pions.cxx
+++ b/benchmarks/tracking/scripts/rec_central_pions.cxx
@@ -84,8 +84,8 @@ int rec_central_pions(const char* fname = "topside/rec_central_pions.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/tracking/scripts/rec_multiple_tracks.cxx b/benchmarks/tracking/scripts/rec_multiple_tracks.cxx
index 02bd77de9c2f6596303874e0a03c0ab4378e5ec1..ada976a32d3f7af3c1f8762cb14bd729d8424c3e 100644
--- a/benchmarks/tracking/scripts/rec_multiple_tracks.cxx
+++ b/benchmarks/tracking/scripts/rec_multiple_tracks.cxx
@@ -84,8 +84,8 @@ int rec_multiple_tracks(const char* fname = "topside/rec_multiple_tracks.root")
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame df("events", fname);
 
-  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
-                 .Define("thrownParticles", "mcparticles2[isThrown]")
+  auto df0 = df.Define("isThrown", "mcparticles.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles[isThrown]")
                  .Define("thrownP", fourvec, {"thrownParticles"})
                  .Define("p_thrown", momentum, {"thrownP"})
                  .Define("theta_thrown", theta, {"thrownP"})
diff --git a/benchmarks/tracking/scripts/tracking_performance.py b/benchmarks/tracking/scripts/tracking_performance.py
index 58256fb102bc3d2e61b71171a2743dd4059e1d25..66f6d73b81472a92dfe7e170b6f16da559435222 100644
--- a/benchmarks/tracking/scripts/tracking_performance.py
+++ b/benchmarks/tracking/scripts/tracking_performance.py
@@ -47,7 +47,7 @@ def flatten_collection(rdf, collection, cols=None):
     dfp.loc[:, 'event'] = evns
     return dfp
 
-def thrown_particles_figure(rdf, save, mcbranch="mcparticles2"):
+def thrown_particles_figure(rdf, save, mcbranch="mcparticles"):
     # define truth particle info
     dft = flatten_collection(rdf, mcbranch, ['genStatus', 'pdgID', 'ps.x', 'ps.y', 'ps.z', 'mass'])
     dft.rename(columns={c: c.replace(mcbranch + '.', '') for c in dft.columns}, inplace=True)