diff --git a/benchmarks/imaging_ecal/options/imaging_topocluster.py b/benchmarks/imaging_ecal/options/imaging_topocluster.py
index ad355de156a9837e898dcccedd03f5b18adf39a4..cf5688129a6ebb15efd35af03bb4ce2cb19efbda 100644
--- a/benchmarks/imaging_ecal/options/imaging_topocluster.py
+++ b/benchmarks/imaging_ecal/options/imaging_topocluster.py
@@ -2,8 +2,7 @@ import json
 import os
 import ROOT
 from Gaudi.Configuration import *
-from GaudiKernel import SystemOfUnits as units
-
+from GaudiKernel.SystemOfUnits import mm, MeV, rad, ns
 from Configurables import ApplicationMgr, EICDataSvc, PodioOutput, GeoSvc
 
 from Configurables import PodioInput
@@ -49,7 +48,7 @@ calcopier = CalCopier("CalCopier",
 
 # use the same daq_setting for digi/reco pair
 daq_setting = dict(
-        dynamicRangeADC=3*units.MeV,
+        dynamicRangeADC=3*MeV,
         capacityADC=32767,
         pedestalMean=400,
         pedestalSigma=50)   # 50/32767*3 MeV ~ 5 keV
@@ -70,10 +69,10 @@ imcalreco = ImagingPixelReco("imcal_reco",
 imcalcluster = ImagingTopoCluster("imcal_cluster",
         inputHitCollection=imcalreco.outputHitCollection,
         outputProtoClusterCollection="EcalBarrelImagingProtoClusters",
-        localDistXY=[2.*units.mm, 2*units.mm],
-        layerDistEtaPhi=[10*units.mrad, 10*units.mrad],
+        localDistXY=[2.*mm, 2*mm],
+        layerDistEtaPhi=[0.01*rad, 0.01*rad],
         neighbourLayersRange=2,
-        sectorDist=3.*units.cm,
+        sectorDist=30.*mm,
         minClusterNhits=15,
         minClusterEdep=0.5*MeV)