Tweaked solid geometry to make it match what Jay says.

modified: StandInGeometrySOLID_geo.cpp

src/ConceptDetectors/SoLID/src/StandInGeometrySOLID_geo.cpp

@@ -142,8 +142,11 @@ static Ref_t create_detector(Detector& lcdd, xml_h e, SensitiveDetector sens)
   rOuter = { 
     285.00*cm,285.00*cm
   };
+
+  // From Jay: 10ft from magnet to back of EC
+  double z_endcap_donut0 = 209.01*cm + 10*12*2.54*cm;
   zPlane = { 
-    209.01*cm,485.00*cm
+    209.01*cm, z_endcap_donut0 // 485.00*cm
   };
   Polycone endcap_donut( 0,  ///< Initial Phi starting angle
       360*deg,  ///< Total Phi angle
@@ -165,7 +168,7 @@ static Ref_t create_detector(Detector& lcdd, xml_h e, SensitiveDetector sens)
     285.00*cm,285.00*cm
   };
   zPlane = { 
-    485.01*cm,500.00*cm
+    z_endcap_donut0,z_endcap_donut0 + 15.0*cm
   };
   Polycone endcap_bottom_inner( 0,  ///< Initial Phi starting angle
       360*deg,  ///< Total Phi angle
@@ -187,7 +190,9 @@ static Ref_t create_detector(Detector& lcdd, xml_h e, SensitiveDetector sens)
   185.00*cm,170.00*cm
   };
   zPlane = { 
-  500.01*cm,515.00*cm
+  z_endcap_donut0 + 15.01*cm ,
+  z_endcap_donut0 + 30.0*cm 
+  //500.01*cm,515.00*cm
   };
   Polycone endcap_bottom_outer( 0,  ///< Initial Phi starting angle
       360*deg,  ///< Total Phi angle
@@ -209,7 +214,7 @@ static Ref_t create_detector(Detector& lcdd, xml_h e, SensitiveDetector sens)
     60.00*cm,90.00*cm,90.00*cm
   };
   zPlane = { 
-    189.00*cm,405.00*cm,485.00*cm
+    z_endcap_donut0 - 296.0*cm,z_endcap_donut0 - 80.0*cm ,z_endcap_donut0
   };
   Polycone endcap_nose( 0,  ///< Initial Phi starting angle
       360*deg,  ///< Total Phi angle