diff --git a/DDCore/include/DD4hep/Shapes.h b/DDCore/include/DD4hep/Shapes.h
index 54aa7a7efd1de634d5fe0299235df70bf179522f..b919b1f01e2f97e7a1c329051fa61a2f084a012c 100644
--- a/DDCore/include/DD4hep/Shapes.h
+++ b/DDCore/include/DD4hep/Shapes.h
@@ -588,13 +588,13 @@ namespace dd4hep {
     TruncatedTube& operator=(const TruncatedTube& copy) = default;
   };
   
-  /// Class describing a elliptical tube shape
+  /// Class describing a twisted tube shape
   /**
-   *   This is actually no TGeo shape. This implementation is a placeholder
-   *   for the Geant4 implementation G4TwistedTube.
-   *   In root it is implemented by a simple tube segment.
-   *   When converted to geant4 it will become a G4TwistedTube.
+   *   TGeoEltu - cylindrical tube class. It takes 3 parameters :
+   *            Semi axis of ellipsis in x and y and half-length dz.
    *
+   *   For any further documentation please see the following ROOT documentation:
+   *   \see http://root.cern.ch/root/html/TGeoElTu.html
    *
    *   \author  M.Frank
    *   \version 1.0
@@ -640,13 +640,13 @@ namespace dd4hep {
     EllipticalTube& setDimensions(double a, double b, double dz);
   };
 
-  /// Class describing a twisted tube shape
+  /// Class describing a elliptical tube shape
   /**
-   *   TGeoEltu - cylindrical tube class. It takes 3 parameters :
-   *            Semi axis of ellipsis in x and y and half-length dz.
+   *   This is actually no TGeo shape. This implementation is a placeholder
+   *   for the Geant4 implementation G4TwistedTube.
+   *   In root it is implemented by a simple tube segment.
+   *   When converted to geant4 it will become a G4TwistedTube.
    *
-   *   For any further documentation please see the following ROOT documentation:
-   *   \see http://root.cern.ch/root/html/TGeoElTu.html
    *
    *   \author  M.Frank
    *   \version 1.0
diff --git a/DDCore/include/DD4hep/detail/ShapesInterna.h b/DDCore/include/DD4hep/detail/ShapesInterna.h
index 55ace57241c0f526c3c7a50efac55a44bcf4d12b..6e885ee3a64f6df4e0a761688fd71d9dc5d8759c 100644
--- a/DDCore/include/DD4hep/detail/ShapesInterna.h
+++ b/DDCore/include/DD4hep/detail/ShapesInterna.h
@@ -37,10 +37,10 @@ namespace dd4hep {
     /// Inhibit copy assignment
     TwistedTubeObject& operator=(const TwistedTubeObject&) = delete;
   public:
-    double fPhiTwist {0};       // Twist angle from -fZHalfLength to fZHalfLength
-    double fNegativeEndz {0};   // -ve z endplate
-    double fPositiveEndz {0};   // +ve z endplate
-    int    fNsegments {0};      // Number of segments in totalPhi
+    double fPhiTwist     {0.0};   // Twist angle from -fZHalfLength to fZHalfLength
+    double fNegativeEndz {0.0};   // -ve z endplate
+    double fPositiveEndz {0.0};   // +ve z endplate
+    int    fNsegments    {0};     // Number of segments in totalPhi
     
   public:
     /// Standard constructor
@@ -66,7 +66,7 @@ namespace dd4hep {
     int    GetNsegments()    const { return fNsegments;    }
     
     /// in case shape has some negative parameters, these has to be computed in order to fit the mother
-    virtual TGeoShape *GetMakeRuntimeShape(TGeoShape *mother, TGeoMatrix * /*mat*/) const  override;
+    virtual TGeoShape *GetMakeRuntimeShape(TGeoShape* mother, TGeoMatrix* mat) const  override;
     /// print shape parameters
     virtual void InspectShape() const  override;
 
diff --git a/DDCore/src/ShapeUtilities.cpp b/DDCore/src/ShapeUtilities.cpp
index bf0569bad716ae41559e708cdcfadb29a3766c06..88462e0f24888ea573e4e883d159b42419e170b1 100644
--- a/DDCore/src/ShapeUtilities.cpp
+++ b/DDCore/src/ShapeUtilities.cpp
@@ -737,7 +737,7 @@ namespace dd4hep {
   template <> void set_dimensions(CutTube shape, const std::vector<double>& params)
   {  set_dimensions(shape.ptr(), params);   }
   template <> void set_dimensions(TwistedTube shape, const std::vector<double>& params)
-  {  set_dimensions(shape.ptr(), params);   }
+  {  set_dimensions((TwistedTubeObject*)shape.ptr(), params);   }
   template <> void set_dimensions(EllipticalTube shape, const std::vector<double>& params)
   {  set_dimensions(shape.ptr(), params);   }
   template <> void set_dimensions(Trap shape, const std::vector<double>& params)
diff --git a/DDCore/src/plugins/ShapePlugins.cpp b/DDCore/src/plugins/ShapePlugins.cpp
index 25976c16c626e47c4fe7512a74b762cc3f25b7c8..0d4f629ad34c1501f34e0f270cfe986c7a8b5275 100644
--- a/DDCore/src/plugins/ShapePlugins.cpp
+++ b/DDCore/src/plugins/ShapePlugins.cpp
@@ -117,7 +117,7 @@ static Handle<TObject> create_TwistedTube(Detector&, xml_h element)   {
     zpos = e.zpos();
     zneg = e.zneg();
   }
-  solid = TwistedTube(e.twist(0.0), e.rmin(0.0),e.rmax(),zpos, zneg, nseg, e.deltaphi(2*M_PI));
+  solid = TwistedTube(e.twist(0.0), e.rmin(0.0),e.rmax(),zneg, zpos, nseg, e.deltaphi(2*M_PI));
 
   if ( e.hasAttr(_U(name)) ) solid->SetName(e.attr<string>(_U(name)).c_str());
   return solid;
diff --git a/DDG4/plugins/Geant4DetectorGeometryConstruction.cpp b/DDG4/plugins/Geant4DetectorGeometryConstruction.cpp
index 3666b6b376c637216148368fd0624c2185405bd6..2fe2312e8901d2564e9f1cc10911dff926fb4a60 100644
--- a/DDG4/plugins/Geant4DetectorGeometryConstruction.cpp
+++ b/DDG4/plugins/Geant4DetectorGeometryConstruction.cpp
@@ -74,7 +74,7 @@ namespace dd4hep {
       /// Default destructor
       virtual ~Geant4DetectorGeometryConstruction();
       /// Geometry construction callback. Called at "Construct()"
-      void constructGeo(Geant4DetectorConstructionContext* ctxt);
+      void constructGeo(Geant4DetectorConstructionContext* ctxt)  override;
       /// Install command control messenger to write GDML file from command prompt.
       virtual void installCommandMessenger()   override;
     };
diff --git a/examples/ClientTests/compact/Check_Shape_TwistedTube.xml b/examples/ClientTests/compact/Check_Shape_TwistedTube.xml
index 56431eacb08d11598baa8ee9bb1e382c91ea6001..d2b795a3859497f4e6a276a7337ee8f9ff401d6b 100644
--- a/examples/ClientTests/compact/Check_Shape_TwistedTube.xml
+++ b/examples/ClientTests/compact/Check_Shape_TwistedTube.xml
@@ -10,11 +10,7 @@
         <position x="30"  y="30"   z="30"/>
         <rotation x="0"   y="0"    z="0"/>
       </check>
-<a>
       <test  type="DD4hep_Mesh_Verifier" ref="${DD4hepExamplesINSTALL}/examples/ClientTests/ref/Ref_TwistedTube.txt" create="CheckShape_create"/>
-</a>
-      <test  type="DD4hep_Mesh_Verifier" ref="${DD4hepExamplesINSTALL}/examples/ClientTests/ref/Ref_TwistedTube.txt" create="1"/>
-
     </detector>
   </detectors>
 </lccdd>
diff --git a/examples/ClientTests/ref/Ref_TwistedTube.txt b/examples/ClientTests/ref/Ref_TwistedTube.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3dc484c646bf65b414a5c49f86194913e5b0905b
--- /dev/null
+++ b/examples/ClientTests/ref/Ref_TwistedTube.txt
@@ -0,0 +1,87 @@
+ShapeCheck[0] dd4hep::TwistedTubeObject 84 Mesh-points:
+dd4hep::TwistedTubeObject TwistedTube N(mesh)=84  N(vert)=84  N(seg)=168  N(pols)=82
+dd4hep::TwistedTubeObject 0   Local  (  10.00,    0.00,   40.00) Global (  40.00,   30.00,   70.00)
+dd4hep::TwistedTubeObject 1   Local  (   9.99,    0.39,   40.00) Global (  39.99,   30.39,   70.00)
+dd4hep::TwistedTubeObject 2   Local  (   9.97,    0.78,   40.00) Global (  39.97,   30.78,   70.00)
+dd4hep::TwistedTubeObject 3   Local  (   9.93,    1.18,   40.00) Global (  39.93,   31.18,   70.00)
+dd4hep::TwistedTubeObject 4   Local  (   9.88,    1.56,   40.00) Global (  39.88,   31.56,   70.00)
+dd4hep::TwistedTubeObject 5   Local  (   9.81,    1.95,   40.00) Global (  39.81,   31.95,   70.00)
+dd4hep::TwistedTubeObject 6   Local  (   9.72,    2.33,   40.00) Global (  39.72,   32.33,   70.00)
+dd4hep::TwistedTubeObject 7   Local  (   9.62,    2.71,   40.00) Global (  39.62,   32.71,   70.00)
+dd4hep::TwistedTubeObject 8   Local  (   9.51,    3.09,   40.00) Global (  39.51,   33.09,   70.00)
+dd4hep::TwistedTubeObject 9   Local  (   9.38,    3.46,   40.00) Global (  39.38,   33.46,   70.00)
+dd4hep::TwistedTubeObject 10  Local  (   9.24,    3.83,   40.00) Global (  39.24,   33.83,   70.00)
+dd4hep::TwistedTubeObject 11  Local  (   9.08,    4.19,   40.00) Global (  39.08,   34.19,   70.00)
+dd4hep::TwistedTubeObject 12  Local  (   8.91,    4.54,   40.00) Global (  38.91,   34.54,   70.00)
+dd4hep::TwistedTubeObject 13  Local  (   8.72,    4.89,   40.00) Global (  38.72,   34.89,   70.00)
+dd4hep::TwistedTubeObject 14  Local  (   8.53,    5.22,   40.00) Global (  38.53,   35.22,   70.00)
+dd4hep::TwistedTubeObject 15  Local  (   8.31,    5.56,   40.00) Global (  38.31,   35.56,   70.00)
+dd4hep::TwistedTubeObject 16  Local  (   8.09,    5.88,   40.00) Global (  38.09,   35.88,   70.00)
+dd4hep::TwistedTubeObject 17  Local  (   7.85,    6.19,   40.00) Global (  37.85,   36.19,   70.00)
+dd4hep::TwistedTubeObject 18  Local  (   7.60,    6.49,   40.00) Global (  37.60,   36.49,   70.00)
+dd4hep::TwistedTubeObject 19  Local  (   7.34,    6.79,   40.00) Global (  37.34,   36.79,   70.00)
+dd4hep::TwistedTubeObject 20  Local  (   7.07,    7.07,   40.00) Global (  37.07,   37.07,   70.00)
+dd4hep::TwistedTubeObject 21  Local  (  30.00,    0.00,   40.00) Global (  60.00,   30.00,   70.00)
+dd4hep::TwistedTubeObject 22  Local  (  29.98,    1.18,   40.00) Global (  59.98,   31.18,   70.00)
+dd4hep::TwistedTubeObject 23  Local  (  29.91,    2.35,   40.00) Global (  59.91,   32.35,   70.00)
+dd4hep::TwistedTubeObject 24  Local  (  29.79,    3.53,   40.00) Global (  59.79,   33.53,   70.00)
+dd4hep::TwistedTubeObject 25  Local  (  29.63,    4.69,   40.00) Global (  59.63,   34.69,   70.00)
+dd4hep::TwistedTubeObject 26  Local  (  29.42,    5.85,   40.00) Global (  59.42,   35.85,   70.00)
+dd4hep::TwistedTubeObject 27  Local  (  29.17,    7.00,   40.00) Global (  59.17,   37.00,   70.00)
+dd4hep::TwistedTubeObject 28  Local  (  28.87,    8.14,   40.00) Global (  58.87,   38.14,   70.00)
+dd4hep::TwistedTubeObject 29  Local  (  28.53,    9.27,   40.00) Global (  58.53,   39.27,   70.00)
+dd4hep::TwistedTubeObject 30  Local  (  28.15,   10.38,   40.00) Global (  58.15,   40.38,   70.00)
+dd4hep::TwistedTubeObject 31  Local  (  27.72,   11.48,   40.00) Global (  57.72,   41.48,   70.00)
+dd4hep::TwistedTubeObject 32  Local  (  27.24,   12.56,   40.00) Global (  57.24,   42.56,   70.00)
+dd4hep::TwistedTubeObject 33  Local  (  26.73,   13.62,   40.00) Global (  56.73,   43.62,   70.00)
+dd4hep::TwistedTubeObject 34  Local  (  26.17,   14.66,   40.00) Global (  56.17,   44.66,   70.00)
+dd4hep::TwistedTubeObject 35  Local  (  25.58,   15.67,   40.00) Global (  55.58,   45.67,   70.00)
+dd4hep::TwistedTubeObject 36  Local  (  24.94,   16.67,   40.00) Global (  54.94,   46.67,   70.00)
+dd4hep::TwistedTubeObject 37  Local  (  24.27,   17.63,   40.00) Global (  54.27,   47.63,   70.00)
+dd4hep::TwistedTubeObject 38  Local  (  23.56,   18.57,   40.00) Global (  53.56,   48.57,   70.00)
+dd4hep::TwistedTubeObject 39  Local  (  22.81,   19.48,   40.00) Global (  52.81,   49.48,   70.00)
+dd4hep::TwistedTubeObject 40  Local  (  22.03,   20.36,   40.00) Global (  52.03,   50.36,   70.00)
+dd4hep::TwistedTubeObject 41  Local  (  21.21,   21.21,   40.00) Global (  51.21,   51.21,   70.00)
+dd4hep::TwistedTubeObject 42  Local  (  10.00,    0.00,  -40.00) Global (  40.00,   30.00,  -10.00)
+dd4hep::TwistedTubeObject 43  Local  (   9.99,    0.39,  -40.00) Global (  39.99,   30.39,  -10.00)
+dd4hep::TwistedTubeObject 44  Local  (   9.97,    0.78,  -40.00) Global (  39.97,   30.78,  -10.00)
+dd4hep::TwistedTubeObject 45  Local  (   9.93,    1.18,  -40.00) Global (  39.93,   31.18,  -10.00)
+dd4hep::TwistedTubeObject 46  Local  (   9.88,    1.56,  -40.00) Global (  39.88,   31.56,  -10.00)
+dd4hep::TwistedTubeObject 47  Local  (   9.81,    1.95,  -40.00) Global (  39.81,   31.95,  -10.00)
+dd4hep::TwistedTubeObject 48  Local  (   9.72,    2.33,  -40.00) Global (  39.72,   32.33,  -10.00)
+dd4hep::TwistedTubeObject 49  Local  (   9.62,    2.71,  -40.00) Global (  39.62,   32.71,  -10.00)
+dd4hep::TwistedTubeObject 50  Local  (   9.51,    3.09,  -40.00) Global (  39.51,   33.09,  -10.00)
+dd4hep::TwistedTubeObject 51  Local  (   9.38,    3.46,  -40.00) Global (  39.38,   33.46,  -10.00)
+dd4hep::TwistedTubeObject 52  Local  (   9.24,    3.83,  -40.00) Global (  39.24,   33.83,  -10.00)
+dd4hep::TwistedTubeObject 53  Local  (   9.08,    4.19,  -40.00) Global (  39.08,   34.19,  -10.00)
+dd4hep::TwistedTubeObject 54  Local  (   8.91,    4.54,  -40.00) Global (  38.91,   34.54,  -10.00)
+dd4hep::TwistedTubeObject 55  Local  (   8.72,    4.89,  -40.00) Global (  38.72,   34.89,  -10.00)
+dd4hep::TwistedTubeObject 56  Local  (   8.53,    5.22,  -40.00) Global (  38.53,   35.22,  -10.00)
+dd4hep::TwistedTubeObject 57  Local  (   8.31,    5.56,  -40.00) Global (  38.31,   35.56,  -10.00)
+dd4hep::TwistedTubeObject 58  Local  (   8.09,    5.88,  -40.00) Global (  38.09,   35.88,  -10.00)
+dd4hep::TwistedTubeObject 59  Local  (   7.85,    6.19,  -40.00) Global (  37.85,   36.19,  -10.00)
+dd4hep::TwistedTubeObject 60  Local  (   7.60,    6.49,  -40.00) Global (  37.60,   36.49,  -10.00)
+dd4hep::TwistedTubeObject 61  Local  (   7.34,    6.79,  -40.00) Global (  37.34,   36.79,  -10.00)
+dd4hep::TwistedTubeObject 62  Local  (   7.07,    7.07,  -40.00) Global (  37.07,   37.07,  -10.00)
+dd4hep::TwistedTubeObject 63  Local  (  30.00,    0.00,  -40.00) Global (  60.00,   30.00,  -10.00)
+dd4hep::TwistedTubeObject 64  Local  (  29.98,    1.18,  -40.00) Global (  59.98,   31.18,  -10.00)
+dd4hep::TwistedTubeObject 65  Local  (  29.91,    2.35,  -40.00) Global (  59.91,   32.35,  -10.00)
+dd4hep::TwistedTubeObject 66  Local  (  29.79,    3.53,  -40.00) Global (  59.79,   33.53,  -10.00)
+dd4hep::TwistedTubeObject 67  Local  (  29.63,    4.69,  -40.00) Global (  59.63,   34.69,  -10.00)
+dd4hep::TwistedTubeObject 68  Local  (  29.42,    5.85,  -40.00) Global (  59.42,   35.85,  -10.00)
+dd4hep::TwistedTubeObject 69  Local  (  29.17,    7.00,  -40.00) Global (  59.17,   37.00,  -10.00)
+dd4hep::TwistedTubeObject 70  Local  (  28.87,    8.14,  -40.00) Global (  58.87,   38.14,  -10.00)
+dd4hep::TwistedTubeObject 71  Local  (  28.53,    9.27,  -40.00) Global (  58.53,   39.27,  -10.00)
+dd4hep::TwistedTubeObject 72  Local  (  28.15,   10.38,  -40.00) Global (  58.15,   40.38,  -10.00)
+dd4hep::TwistedTubeObject 73  Local  (  27.72,   11.48,  -40.00) Global (  57.72,   41.48,  -10.00)
+dd4hep::TwistedTubeObject 74  Local  (  27.24,   12.56,  -40.00) Global (  57.24,   42.56,  -10.00)
+dd4hep::TwistedTubeObject 75  Local  (  26.73,   13.62,  -40.00) Global (  56.73,   43.62,  -10.00)
+dd4hep::TwistedTubeObject 76  Local  (  26.17,   14.66,  -40.00) Global (  56.17,   44.66,  -10.00)
+dd4hep::TwistedTubeObject 77  Local  (  25.58,   15.67,  -40.00) Global (  55.58,   45.67,  -10.00)
+dd4hep::TwistedTubeObject 78  Local  (  24.94,   16.67,  -40.00) Global (  54.94,   46.67,  -10.00)
+dd4hep::TwistedTubeObject 79  Local  (  24.27,   17.63,  -40.00) Global (  54.27,   47.63,  -10.00)
+dd4hep::TwistedTubeObject 80  Local  (  23.56,   18.57,  -40.00) Global (  53.56,   48.57,  -10.00)
+dd4hep::TwistedTubeObject 81  Local  (  22.81,   19.48,  -40.00) Global (  52.81,   49.48,  -10.00)
+dd4hep::TwistedTubeObject 82  Local  (  22.03,   20.36,  -40.00) Global (  52.03,   50.36,  -10.00)
+dd4hep::TwistedTubeObject 83  Local  (  21.21,   21.21,  -40.00) Global (  51.21,   51.21,  -10.00)
+dd4hep::TwistedTubeObject Bounding box:  dx=  11.46 dy=  10.61 dz= -40.00 Origin: x=  18.54 y=  10.61 z=   0.00
diff --git a/examples/ClientTests/scripts/Check_shape.py b/examples/ClientTests/scripts/Check_shape.py
index 1ed692dc62988739482c3fddfb2a0125c2e0882c..48a36d2b69e5699fd726ecaff30b1a97c69ee7df 100644
--- a/examples/ClientTests/scripts/Check_shape.py
+++ b/examples/ClientTests/scripts/Check_shape.py
@@ -27,7 +27,6 @@ def run():
 
   ui = geant4.setupCshUI(ui=None,vis=vis)
   if batch: kernel.UI = ''
-  print('Geometry:'+str(geo))
   kernel.loadGeometry(geo)
   # Configure field
   geant4.setupTrackingField(prt=True)