diff --git a/CMakeLists.txt b/CMakeLists.txt
index d84efcb..9aa414a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,6 @@ set(ENGINE_SOURCES
     src/Engine/Operator/GeometryOpDef.cpp
     src/Engine/Operator/OperatorTable.cpp
     src/Engine/Operator/GOP_test.cpp
-    src/Engine/Operator/GOP_transform.cpp
     src/Engine/Network/NetworkManager.cpp
 )
 
diff --git a/src/Engine/Operator/GOP_test.cpp b/src/Engine/Operator/GOP_test.cpp
index 7e09b3c..86bbf3d 100644
--- a/src/Engine/Operator/GOP_test.cpp
+++ b/src/Engine/Operator/GOP_test.cpp
@@ -2,8 +2,8 @@
 #include "Engine/Operator/AttributeHandle.h"
 #include <oneapi/tbb/parallel_for.h>
 
-GOP_test::GOP_test(enzo::nt::OpId opId)
-: enzo::nt::GeometryOpDef(opId)
+GOP_test::GOP_test(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager)
+: enzo::nt::GeometryOpDef(opId, networkManager)
 {
 
 }
diff --git a/src/Engine/Operator/GOP_test.h b/src/Engine/Operator/GOP_test.h
index db8e8ac..69e9da6 100644
--- a/src/Engine/Operator/GOP_test.h
+++ b/src/Engine/Operator/GOP_test.h
@@ -5,11 +5,11 @@ class GOP_test
 : public enzo::nt::GeometryOpDef
 {
 public:
-    GOP_test(enzo::nt::OpId opId);
+    GOP_test(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager);
     virtual void cookOp();
-    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId)
+    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager)
     {
-        return new GOP_test(opId);
+        return new GOP_test(opId, networkManager);
     }
 
 };
diff --git a/src/Engine/Operator/GOP_transform.cpp b/src/Engine/Operator/GOP_transform.cpp
deleted file mode 100644
index 1311345..0000000
--- a/src/Engine/Operator/GOP_transform.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-#include "Engine/Operator/GOP_transform.h"
-#include "Engine/Operator/AttributeHandle.h"
-#include <oneapi/tbb/parallel_for.h>
-
-GOP_transform::GOP_transform(enzo::nt::OpId opId)
-: enzo::nt::GeometryOpDef(opId)
-{
-
-}
-
-void GOP_transform::cookOp()
-{
-    using namespace enzo;
-    // std::cout << "COOKING\n";
-
-    if(outputRequested(0))
-    {
-        // copy input geometry
-        geo::Geometry geo = cloneInputGeo(0);
-
-        // ----
-        // create geometry start
-        // ----
-        auto PAttr = geo.getAttribByName(ga::AttrOwner::POINT, "P");
-        ga::AttributeHandleVector3 PAttrHandle(PAttr);
-
-        for(int i=0; i<PAttrHandle.getAllValues().size(); ++i)
-        {
-            enzo::bt::Vector3 vector = PAttrHandle.getValue(i);
-            vector.y()+=2.5;
-            PAttrHandle.setValue(i, vector);
-        }
-        // ----
-
-
-
-        // set output geometry
-        setOutputGeometry(0, geo);
-    }
-
-}
-
diff --git a/src/Engine/Operator/GOP_transform.h b/src/Engine/Operator/GOP_transform.h
deleted file mode 100644
index 6c75997..0000000
--- a/src/Engine/Operator/GOP_transform.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#pragma once
-#include "Engine/Operator/GeometryOpDef.h"
-
-class GOP_transform
-: public enzo::nt::GeometryOpDef
-{
-public:
-    GOP_transform(enzo::nt::OpId opId);
-    virtual void cookOp();
-    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId)
-    {
-        return new GOP_transform(opId);
-    }
-
-};
diff --git a/src/Engine/Operator/GeometryOpDef.cpp b/src/Engine/Operator/GeometryOpDef.cpp
index 090deca..4bdc14b 100644
--- a/src/Engine/Operator/GeometryOpDef.cpp
+++ b/src/Engine/Operator/GeometryOpDef.cpp
@@ -22,9 +22,8 @@ const enzo::geo::Geometry& enzo::nt::GeometryOpDef::getInputGeoView(unsigned int
 
 enzo::geo::Geometry enzo::nt::GeometryOpDef::cloneInputGeo(unsigned int inputIndex)
 {
-    auto& nm = nt::nm();
     // TODO: implement
-    enzo::nt::GeometryOperator& selfOp = nm.getGeoOperator(opId_);
+    enzo::nt::GeometryOperator& selfOp = networkManager_.getGeoOperator(opId_);
     std::vector<std::shared_ptr<const nt::GeometryConnection>> inputConnections = selfOp.getInputConnections();
     if(inputConnections.size()==0)
     {
@@ -32,7 +31,7 @@ enzo::geo::Geometry enzo::nt::GeometryOpDef::cloneInputGeo(unsigned int inputInd
         return enzo::geo::Geometry();
     }
     std::shared_ptr<const nt::GeometryConnection> inputConnection = inputConnections.at(inputIndex);
-    return nm.getGeoOperator(inputConnection->getInputOpId()).getOutputGeo(inputConnection->getInputIndex());
+    return networkManager_.getGeoOperator(inputConnection->getInputOpId()).getOutputGeo(inputConnection->getInputIndex());
 }
 
 void enzo::nt::GeometryOpDef::setOutputGeometry(unsigned int outputIndex, enzo::geo::Geometry geometry)
@@ -44,8 +43,8 @@ void enzo::nt::GeometryOpDef::setOutputGeometry(unsigned int outputIndex, enzo::
     outputGeometry_[outputIndex] = geometry;
 }
 
-enzo::nt::GeometryOpDef::GeometryOpDef(enzo::nt::OpId opId)
-: opId_{opId}
+enzo::nt::GeometryOpDef::GeometryOpDef(enzo::nt::OpId opId, NetworkManager& networkManager)
+: opId_{opId}, networkManager_{networkManager}
 {
     minInputs_=1;
     maxInputs_=4;
diff --git a/src/Engine/Operator/GeometryOpDef.h b/src/Engine/Operator/GeometryOpDef.h
index 87677e5..e5b0177 100644
--- a/src/Engine/Operator/GeometryOpDef.h
+++ b/src/Engine/Operator/GeometryOpDef.h
@@ -3,13 +3,15 @@
 #include "Engine/Types.h"
 #include <boost/config.hpp>
 
+
 namespace enzo::nt
 {
+class NetworkManager;
 
 class BOOST_SYMBOL_EXPORT GeometryOpDef
 {
 public:
-    GeometryOpDef(enzo::nt::OpId opId);
+    GeometryOpDef(enzo::nt::OpId opId, NetworkManager& networkManager);
     virtual void cookOp() = 0;
     geo::Geometry& getOutputGeo(unsigned outputIndex);
 private:
@@ -17,6 +19,7 @@ private:
     unsigned int minInputs_;
     unsigned int maxInputs_;
     unsigned int maxOutputs_;
+    NetworkManager& networkManager_;
 protected:
     enzo::nt::OpId opId_;
     const enzo::geo::Geometry& getInputGeoView(unsigned int inputIndex);
@@ -27,5 +30,5 @@ protected:
     void setOutputGeometry(unsigned int outputIndex, enzo::geo::Geometry geometry);
 };
 
-using opConstructor = GeometryOpDef* (*)(enzo::nt::OpId);
+using opConstructor = GeometryOpDef* (*)(enzo::nt::OpId, enzo::nt::NetworkManager&);
 }
diff --git a/src/Engine/Operator/GeometryOperator.cpp b/src/Engine/Operator/GeometryOperator.cpp
index 1b31110..ed4b7b2 100644
--- a/src/Engine/Operator/GeometryOperator.cpp
+++ b/src/Engine/Operator/GeometryOperator.cpp
@@ -24,7 +24,7 @@ void enzo::nt::connectOperators(enzo::nt::OpId inputOpId, unsigned int inputInde
 }
 
 nt::GeometryOperator::GeometryOperator(enzo::nt::OpId opId, nt::opConstructor ctorFunc)
-: opId_{opId}, opDef_(ctorFunc(opId))
+: opId_{opId}, opDef_(ctorFunc(opId, nt::nm()))
 {
     // TODO: drive by geometry definition
     maxInputs_=4;
diff --git a/src/Engine/Operator/GeometryOperator.h b/src/Engine/Operator/GeometryOperator.h
index 64ee13c..0ad5b97 100644
--- a/src/Engine/Operator/GeometryOperator.h
+++ b/src/Engine/Operator/GeometryOperator.h
@@ -11,7 +11,7 @@ void connectOperators(enzo::nt::OpId inputOpId, unsigned int inputIndex, enzo::n
 class GeometryOperator
 {
 public:
-    GeometryOperator(enzo::nt::OpId opId, enzo::nt::GeometryOpDef* (*ctorFunc)(enzo::nt::OpId));
+    GeometryOperator(enzo::nt::OpId opId, nt::opConstructor ctorFunc);
 
     // disable copying
     GeometryOperator(const GeometryOperator&)            = delete;
diff --git a/src/Gui/Network/Network.cpp b/src/Gui/Network/Network.cpp
index 0167eba..bc231b2 100644
--- a/src/Gui/Network/Network.cpp
+++ b/src/Gui/Network/Network.cpp
@@ -20,7 +20,6 @@
 #include <qnamespace.h>
 #include <QLine>
 #include "Engine/Operator/GOP_test.h"
-#include "Engine/Operator/GOP_transform.h"
 
 using namespace enzo;
 
diff --git a/src/OpDefs/CMakeLists.txt b/src/OpDefs/CMakeLists.txt
index 09f993f..094859f 100644
--- a/src/OpDefs/CMakeLists.txt
+++ b/src/OpDefs/CMakeLists.txt
@@ -11,6 +11,8 @@ add_library(${libName} SHARED
     main.cpp
     ../Engine/Operator/OperatorTable.cpp
     ../Engine/Operator/GeometryOpDef.cpp
+    ../Engine/Operator/GeometryOperator.cpp
+    ../Engine/Operator/GeometryConnection.cpp
     ../Engine/Operator/Geometry.cpp
     ../Engine/Operator/Attribute.cpp
     ../Engine/Network/NetworkManager.cpp
diff --git a/src/OpDefs/GopTransform.hpp b/src/OpDefs/GopTransform.hpp
index ada4397..49fabad 100644
--- a/src/OpDefs/GopTransform.hpp
+++ b/src/OpDefs/GopTransform.hpp
@@ -5,11 +5,11 @@ class GopTransform
 : public enzo::nt::GeometryOpDef
 {
 public:
-    GopTransform(enzo::nt::OpId opId);
+    GopTransform(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager);
     virtual void cookOp();
-    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId)
+    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager)
     {
-        return new GopTransform(opId);
+        return new GopTransform(opId, networkManager);
     }
 
 };
diff --git a/src/OpDefs/main.cpp b/src/OpDefs/main.cpp
index 228d841..0afa2f4 100644
--- a/src/OpDefs/main.cpp
+++ b/src/OpDefs/main.cpp
@@ -17,8 +17,8 @@ extern "C"
 
 }
 
-GopTransform::GopTransform(enzo::nt::OpId opId)
-: enzo::nt::GeometryOpDef(opId)
+GopTransform::GopTransform(enzo::nt::OpId opId, enzo::nt::NetworkManager& networkManager)
+: enzo::nt::GeometryOpDef(opId, networkManager)
 {
 
 }