diff --git a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.cpp b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.cpp
index 9c1eacade2fa..86b081a18b28 100644
--- a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.cpp
+++ b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.cpp
@@ -1,6 +1,73 @@
 #include "GLActorVisitor.h"
 #include "GLActor.h"
+#include "GLActorCollection.h"
 #include "ComponentActor.h"
+#include "CompAssemblyActor.h"
+#include "ObjCompAssemblyActor.h"
+#include "InstrumentActor.h"
+#include "RectangularDetectorActor.h"
+
+//   Default visit implementations just call visit(GLActor*)
+
+bool GLActorVisitor::visit(GLActorCollection* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorVisitor::visit(CompAssemblyActor* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorVisitor::visit(ObjCompAssemblyActor* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorVisitor::visit(ComponentActor* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorVisitor::visit(InstrumentActor* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorVisitor::visit(RectangularDetectorActor* actor)
+{
+  return this->visit( static_cast<GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const GLActorCollection* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const CompAssemblyActor* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const ObjCompAssemblyActor* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const ComponentActor* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const InstrumentActor* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
+
+bool GLActorConstVisitor::visit(const RectangularDetectorActor* actor)
+{
+  return this->visit( static_cast<const GLActor*>( actor ) );
+}
 
 bool SetAllVisibleVisitor::visit(GLActor* actor)
 {
diff --git a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.h b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.h
index 652a33a5c16e..b8d4cebc5cce 100644
--- a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.h
+++ b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/GLActorVisitor.h
@@ -19,29 +19,14 @@ class GLActorVisitor
   virtual ~GLActorVisitor(){}
   /// Abstract method that must be implemented in sub-classes
     virtual bool visit(GLActor*) = 0;
-    virtual bool visit(GLActorCollection*) = 0;
-    virtual bool visit(CompAssemblyActor*) = 0;
-    virtual bool visit(ObjCompAssemblyActor*) = 0;
-    virtual bool visit(ComponentActor*) = 0;
-    virtual bool visit(InstrumentActor*) = 0;
-    virtual bool visit(RectangularDetectorActor*) = 0;
+    virtual bool visit(GLActorCollection*);
+    virtual bool visit(CompAssemblyActor*);
+    virtual bool visit(ObjCompAssemblyActor*);
+    virtual bool visit(ComponentActor*);
+    virtual bool visit(InstrumentActor*);
+    virtual bool visit(RectangularDetectorActor*);
 };
 
-#define SAME_VISITS \
-bool visit(GLActorCollection *actor ){return visit( (GLActor*) actor);}\
-bool visit(CompAssemblyActor *actor){return visit( (GLActor*) actor);}\
-bool visit(ObjCompAssemblyActor *actor){return visit( (GLActor*) actor);}\
-bool visit(ComponentActor *actor){return visit( (GLActor*) actor);}\
-bool visit(RectangularDetectorActor *actor){return visit( (GLActor*) actor);}\
-bool visit(InstrumentActor *actor){return visit( (GLActor*) actor);}
-
-#define SAME_VISITS_BUT_COMPONENTACTOR \
-bool visit(GLActorCollection *actor ){return visit( (GLActor*) actor);}\
-bool visit(CompAssemblyActor *actor){return visit( (GLActor*) actor);}\
-bool visit(ObjCompAssemblyActor *actor){return visit( (GLActor*) actor);}\
-bool visit(RectangularDetectorActor *actor){return visit( (GLActor*) actor);}\
-bool visit(InstrumentActor *actor){return visit( (GLActor*) actor);}
-
 /**
  * A base class for an actor visitor (const version).
  */
@@ -52,12 +37,12 @@ class GLActorConstVisitor
   virtual ~GLActorConstVisitor(){}
   /// Abstract method that must be implemented in sub-classes
     virtual bool visit(const GLActor*) = 0;
-    virtual bool visit(const GLActorCollection*) = 0;
-    virtual bool visit(const CompAssemblyActor*) = 0;
-    virtual bool visit(const ObjCompAssemblyActor*) = 0;
-    virtual bool visit(const ComponentActor*) = 0;
-    virtual bool visit(const InstrumentActor*) = 0;
-    virtual bool visit(const RectangularDetectorActor*) = 0;
+    virtual bool visit(const GLActorCollection*);
+    virtual bool visit(const CompAssemblyActor*);
+    virtual bool visit(const ObjCompAssemblyActor*);
+    virtual bool visit(const ComponentActor*);
+    virtual bool visit(const InstrumentActor*);
+    virtual bool visit(const RectangularDetectorActor*);
 };
 
 
@@ -82,7 +67,6 @@ class SetAllVisibleVisitor: public SetVisibilityVisitor
     SetAllVisibleVisitor(bool showNonDet):m_showNonDet(showNonDet){}
     bool visit(GLActor*);
     bool visit(ComponentActor *actor);
-    SAME_VISITS_BUT_COMPONENTACTOR
 private:
     bool m_showNonDet;
 };
diff --git a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.h b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.h
index 16f560050a57..faa6fb1f79d0 100644
--- a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.h
+++ b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.h
@@ -254,7 +254,6 @@ class SetVisibleNonDetectorVisitor: public SetVisibilityVisitor
   /// @param on :: If true then all non-detectors will be made visible or invisible if false.
   SetVisibleNonDetectorVisitor(bool on):m_on(on){}
   bool visit(GLActor*);
-  SAME_VISITS
 private:
   bool m_on;
 };
@@ -267,7 +266,6 @@ class FindComponentVisitor: public GLActorVisitor
 public:
   FindComponentVisitor(const Mantid::Geometry::ComponentID id):m_id(id),m_actor(NULL){}
   bool visit(GLActor*);
-  SAME_VISITS
   ComponentActor* getActor()const{return m_actor;}
 private:
   Mantid::Geometry::ComponentID m_id;