diff --git a/OSCADSharp/OSCADSharp.UnitTests/Scripting/VariableTests.cs b/OSCADSharp/OSCADSharp.UnitTests/Scripting/VariableTests.cs
index dbb5481..e39cd90 100644
--- a/OSCADSharp/OSCADSharp.UnitTests/Scripting/VariableTests.cs
+++ b/OSCADSharp/OSCADSharp.UnitTests/Scripting/VariableTests.cs
@@ -26,7 +26,7 @@ namespace OSCADSharp.UnitTests.Scripting
             var compound = new Variable("x", 5) / 12;
 
             string type = compound.GetType().ToString();
-            Assert.AreEqual("OSCADSharp.DataBinding.CompoundVariable", type);
+            Assert.AreEqual("OSCADSharp.DataBinding.Variable+CompoundVariable", type);
         }
     }
 }
diff --git a/OSCADSharp/OSCADSharp/OSCADObject.AbstractTransforms.cs b/OSCADSharp/OSCADSharp/OSCADObject.AbstractTransforms.cs
index aac58fa..513fc70 100644
--- a/OSCADSharp/OSCADSharp/OSCADObject.AbstractTransforms.cs
+++ b/OSCADSharp/OSCADSharp/OSCADObject.AbstractTransforms.cs
@@ -35,7 +35,7 @@ namespace OSCADSharp
 
             internal MirroredObject(OSCADObject obj, Variable normal) : base(obj)
             {
-                this.Bind("normal", normal);
+                this.BindIfVariableNotNull("normal", normal);
             }
 
             internal MirroredObject(OSCADObject obj, Vector3 normal, Variable x, Variable y, Variable z) : base(obj)
diff --git a/OSCADSharp/OSCADSharp/OSCADObject.BasicTransforms.cs b/OSCADSharp/OSCADSharp/OSCADObject.BasicTransforms.cs
index 87bb081..a25553b 100644
--- a/OSCADSharp/OSCADSharp/OSCADObject.BasicTransforms.cs
+++ b/OSCADSharp/OSCADSharp/OSCADObject.BasicTransforms.cs
@@ -42,7 +42,7 @@ namespace OSCADSharp
             /// <param name="opacity"></param>
             internal ColoredObject(OSCADObject obj, Variable colorName, Variable opacity) : base(obj)
             {
-                this.Bind("color", colorName);
+                this.BindIfVariableNotNull("color", colorName);
                 this.BindIfVariableNotNull("opacity", opacity);
             }
 
@@ -112,7 +112,7 @@ namespace OSCADSharp
 
             internal ResizedObject(OSCADObject obj, Variable size) : base(obj)
             {
-                this.Bind("size", size);
+                this.BindIfVariableNotNull("size", size);
             }
 
             internal ResizedObject(OSCADObject obj, Vector3 size, Variable x, Variable y, Variable z) : base(obj)
@@ -211,7 +211,7 @@ namespace OSCADSharp
 
             internal RotatedObject(OSCADObject obj, Variable normal) : base(obj)
             {
-                this.Bind("angle", normal);
+                this.BindIfVariableNotNull("angle", normal);
             }
 
             internal RotatedObject(OSCADObject obj, Vector3 angle, Variable x, Variable y, Variable z) : base(obj)
@@ -297,7 +297,7 @@ namespace OSCADSharp
 
             internal ScaledObject(OSCADObject obj, Variable normal) : base(obj)
             {
-                this.Bind("scalefactor", normal);
+                this.BindIfVariableNotNull("scalefactor", normal);
             }
 
             internal ScaledObject(OSCADObject obj, Vector3 scale, Variable x, Variable y, Variable z) : base(obj)
@@ -380,7 +380,7 @@ namespace OSCADSharp
 
             internal TranslatedObject(OSCADObject obj, Variable normal) : base(obj)
             {
-                this.Bind("vector", normal);
+                this.BindIfVariableNotNull("vector", normal);
             }
 
             internal TranslatedObject(OSCADObject obj, Vector3 vector, Variable x, Variable y, Variable z) : base(obj)