diff --git a/src/Core/Object.cpp b/src/Core/Object.cpp
index 9f861b0..f1d92fb 100644
--- a/src/Core/Object.cpp
+++ b/src/Core/Object.cpp
@@ -59,6 +59,10 @@ public:
     GenericMFPtr sloptr;
     std::string slostr;
   };
+
+  ~ObjectPrivate() {
+    for (auto& s : sigv) delete s.signal;
+  }
   
   std::string m_InstanceName;
   std::vector<Signal> sigv;
@@ -71,7 +75,13 @@ public:
 
 // Implementations of Property methods
 void Object::RegisterDisplayProperty(PropertyBase* prop) {
-    if (prop) d->m_DisplayProperties.push_back(prop);
+    if (prop) {
+        for (auto* existing : d->m_DisplayProperties) {
+            if (existing == prop) return;
+            if (existing->GetName() == prop->GetName()) return;
+        }
+        d->m_DisplayProperties.push_back(prop);
+    }
 }
 
 const std::vector<PropertyBase*>& Object::GetDisplayProperties() const {
@@ -80,6 +90,10 @@ const std::vector<PropertyBase*>& Object::GetDisplayProperties() const {
 
 void Object::RegisterProperty(PropertyBase* prop) {
     if (prop) {
+        for (auto* existing : d->m_Properties) {
+            if (existing == prop) return;
+            if (existing->GetName() == prop->GetName()) return;
+        }
         d->m_Properties.push_back(prop);
     }
 }
@@ -105,13 +119,16 @@ PropertyBase* Object::GetProperty(const std::string& name) const {
     for (auto* p : d->m_DynamicProperties) {
         if (p->GetName() == name || p->GetQualifiedName() == name) return p;
     }
+    for (auto* p : d->m_DisplayProperties) {
+        if (p->GetName() == name || p->GetQualifiedName() == name) return p;
+    }
     return nullptr;
 }
 
 void Object::NotifyPropertiesUpdated() {
+    // Only notify properties in the primary list to avoid duplicates, 
+    // as all registered properties should be there.
     for (auto* p : d->m_Properties) p->Updated();
-    for (auto* p : d->m_DynamicProperties) p->Updated();
-    this->Updated();
 }
 
 void Object::Updated() { ULIB_SIGNAL_EMIT(Object::Updated); }
@@ -147,6 +164,9 @@ Object::~Object() {
     for (auto* p : d->m_DynamicProperties) {
         delete p;
     }
+    for (auto* p : d->m_DisplayProperties) {
+        delete p;
+    }
     delete d;
 }
 
diff --git a/src/Core/Property.h b/src/Core/Property.h
index acf9348..e9386da 100644
--- a/src/Core/Property.h
+++ b/src/Core/Property.h
@@ -103,6 +103,7 @@ public:
   // Accessors
   const T& Get() const { return *m_value; }
   void Set(const T& value) {
+    if (!m_value) return;
     T val = value;
     if constexpr (std::is_arithmetic<T>::value) {
       if (m_HasRange) { if (val < m_Min) val = m_Min; if (val > m_Max) val = m_Max; }
diff --git a/src/Core/testing/ObjectWrapperTest.cpp b/src/Core/testing/ObjectWrapperTest.cpp
index 84191dd..06b9e72 100644
--- a/src/Core/testing/ObjectWrapperTest.cpp
+++ b/src/Core/testing/ObjectWrapperTest.cpp
@@ -24,3 +24,5 @@ int main() {
     std::cout << "Tests passed (compilation and manual instantiation)!" << std::endl;
     return 0;
 }
+
+
diff --git a/src/Vtk/Math/testing/vtkContainerBoxTest.cpp b/src/Vtk/Math/testing/vtkContainerBoxTest.cpp
index 1804776..5ab94ab 100644
--- a/src/Vtk/Math/testing/vtkContainerBoxTest.cpp
+++ b/src/Vtk/Math/testing/vtkContainerBoxTest.cpp
@@ -36,11 +36,11 @@ int main() {
   BEGIN_TESTING(vtk ContainerBox Test);
 
   {
-    ContainerBox box;
-    box.Scale(Vector3f(1_m, 2_m, 1_m));
-    box.SetPosition(Vector3f(0, 0, 0));
+    ContainerBox* box = new ContainerBox();
+    box->Scale(Vector3f(1_m, 2_m, 1_m));
+    box->SetPosition(Vector3f(0, 0, 0));
 
-    Vtk::ContainerBox v_box(&box);
+    Vtk::ContainerBox v_box(box);
     v_box.Update();
 
     v_box.SetRepresentation(Vtk::Prop3D::Surface);
diff --git a/src/Vtk/Math/testing/vtkContainerBoxTest2.cpp b/src/Vtk/Math/testing/vtkContainerBoxTest2.cpp
index 1db8e3b..11b858a 100644
--- a/src/Vtk/Math/testing/vtkContainerBoxTest2.cpp
+++ b/src/Vtk/Math/testing/vtkContainerBoxTest2.cpp
@@ -15,11 +15,11 @@ using namespace uLib;
 
 int main() {
     std::cout << "Creating ContainerBox..." << std::endl;
-    ContainerBox box(Vector3f(1.0, 1.0, 1.0)); // 1x1x1 unit box
-    box.SetInstanceName("MyTestBox");
+    ContainerBox* box = new ContainerBox(Vector3f(1.0, 1.0, 1.0)); // 1x1x1 unit box
+    box->SetInstanceName("MyTestBox");
 
     std::cout << "Creating VTK representation..." << std::endl;
-    Vtk::ContainerBox v_box(&box);
+    Vtk::ContainerBox v_box(box);
     v_box.SetRepresentation(Vtk::Prop3D::Wireframe);
     v_box.SetColor(1.0, 0.0, 0.0); // Red
 
diff --git a/src/Vtk/testing/Prop3DPropertyTest.cpp b/src/Vtk/testing/Prop3DPropertyTest.cpp
index 72bff19..60c0c31 100644
--- a/src/Vtk/testing/Prop3DPropertyTest.cpp
+++ b/src/Vtk/testing/Prop3DPropertyTest.cpp
@@ -11,6 +11,7 @@
 
 #include "Vtk/uLibVtkInterface.h"
 #include "Core/Property.h"
+#include "Math/Dense.h"
 #include <iostream>
 #include <cassert>
 #include "testing-prototype.h"
@@ -33,7 +34,7 @@ int main() {
     
     // Verify specific properties exist
     Property<double>* opacityProp = nullptr;
-    Property<double>* colorRProp = nullptr;
+    Property<Vector3d>* colorProp = nullptr;
     
     for (auto* prop : props) {
         std::cout << "  - [" << prop->GetTypeName() << "] " << prop->GetName() 
@@ -42,13 +43,13 @@ int main() {
         if (prop->GetName() == "Opacity") {
             opacityProp = dynamic_cast<Property<double>*>(prop);
         }
-        if (prop->GetName() == "ColorR") {
-            colorRProp = dynamic_cast<Property<double>*>(prop);
+        if (prop->GetName() == "Color") {
+            colorProp = dynamic_cast<Property<Vector3d>*>(prop);
         }
     }
     
     assert(opacityProp != nullptr && "Opacity property not registered!");
-    assert(colorRProp != nullptr && "ColorR property not registered!");
+    assert(colorProp != nullptr && "Color property not registered!");
 
     // Test modification via uLib Property interface
     std::cout << "Modifying Opacity via property proxy (0.25)..." << std::endl;
@@ -58,9 +59,9 @@ int main() {
     assert(opacityProp->Get() == 0.25);
     assert(opacityProp->GetValueAsString().find("0.25") != std::string::npos);
 
-    std::cout << "Modifying ColorR via property proxy (0.9)..." << std::endl;
-    *colorRProp = 0.9;
-    assert(colorRProp->Get() == 0.9);
+    std::cout << "Modifying Color via property proxy (0.9, 0.1, 0.1)..." << std::endl;
+    *colorProp = Vector3d(0.9, 0.1, 0.1);
+    assert(colorProp->Get().x() == 0.9);
 
     std::cout << "All Prop3D Property Registration Tests PASSED!" << std::endl;
 
diff --git a/src/Vtk/uLibVtkInterface.cxx b/src/Vtk/uLibVtkInterface.cxx
index 6dbd2bf..90ad2f8 100644
--- a/src/Vtk/uLibVtkInterface.cxx
+++ b/src/Vtk/uLibVtkInterface.cxx
@@ -290,9 +290,6 @@ public:
 
 Prop3D::Prop3D() : Object(), pd(new Prop3DData(this)) { 
     ULIB_ACTIVATE_DISPLAY_PROPERTIES;
-    for (auto* p : this->GetDisplayProperties()) {
-        uLib::Object::connect(p, &uLib::Object::Updated, this, &Prop3D::Update);
-    }
 }
 
 Prop3D::~Prop3D()