diff --git a/MatterControlLib/DesignTools/Obsolete/CurveObject3D.cs b/MatterControlLib/DesignTools/Obsolete/CurveObject3D.cs
index 9cfd863bf..f0d826d08 100644
--- a/MatterControlLib/DesignTools/Obsolete/CurveObject3D.cs
+++ b/MatterControlLib/DesignTools/Obsolete/CurveObject3D.cs
@@ -173,12 +173,12 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool propertyUpdated = Diameter == double.MinValue;
+			bool valuesChanged = Diameter == double.MinValue;
 			if (StartPercent < 0
 				|| StartPercent > 100)
 			{
 				StartPercent = Math.Min(100, Math.Max(0, StartPercent));
-				propertyUpdated = true;
+				valuesChanged = true;
 			}
 
 			using (RebuildLock())
@@ -276,9 +276,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (propertyUpdated)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Operations/ScaleObject3D.cs b/MatterControlLib/DesignTools/Operations/ScaleObject3D.cs
index 029f71cf2..dfa104e2a 100644
--- a/MatterControlLib/DesignTools/Operations/ScaleObject3D.cs
+++ b/MatterControlLib/DesignTools/Operations/ScaleObject3D.cs
@@ -258,7 +258,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 			else if(change.Changed == nameof(UsePercentage))
 			{
 				// make sure we update the controls on screen to reflect the different data type
-				Invalidate(new InvalidateArgs(null, InvalidateType.Properties));
+				Invalidate(new InvalidateArgs(null, InvalidateType.DisplayValues));
 			}
 			else if (change.Changed == nameof(MaitainProportions))
 			{
@@ -268,7 +268,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 					ScaleRatio = new Vector3(maxScale, maxScale, maxScale);
 					Rebuild();
 					// make sure we update the controls on screen to reflect the different data type
-					Invalidate(new InvalidateArgs(null, InvalidateType.Properties));
+					Invalidate(new InvalidateArgs(null, InvalidateType.DisplayValues));
 				}
 			}
 			else if (change.Changed == nameof(SizeX))
@@ -280,7 +280,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 					ScaleRatio[2] = ScaleRatio[0];
 					Rebuild();
 					// and invalidate the other properties
-					Invalidate(new InvalidateArgs(null, InvalidateType.Properties));
+					Invalidate(new InvalidateArgs(null, InvalidateType.DisplayValues));
 				}
 			}
 			else if (change.Changed == nameof(SizeY))
@@ -292,7 +292,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 					ScaleRatio[2] = ScaleRatio[1];
 					Rebuild();
 					// and invalidate the other properties
-					Invalidate(new InvalidateArgs(null, InvalidateType.Properties));
+					Invalidate(new InvalidateArgs(null, InvalidateType.DisplayValues));
 				}
 			}
 			else if (change.Changed == nameof(SizeZ))
@@ -304,7 +304,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 					ScaleRatio[1] = ScaleRatio[2];
 					Rebuild();
 					// and invalidate the other properties
-					Invalidate(new InvalidateArgs(null, InvalidateType.Properties));
+					Invalidate(new InvalidateArgs(null, InvalidateType.DisplayValues));
 				}
 			}
 		}
diff --git a/MatterControlLib/DesignTools/Primitives/CylinderObject3D.cs b/MatterControlLib/DesignTools/Primitives/CylinderObject3D.cs
index 6f6769835..aa8843f8e 100644
--- a/MatterControlLib/DesignTools/Primitives/CylinderObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/CylinderObject3D.cs
@@ -134,11 +134,11 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 
 			using (RebuildLock())
 			{
-				Sides = agg_basics.Clamp(Sides, 3, 360, ref changed);
+				Sides = agg_basics.Clamp(Sides, 3, 360, ref valuesChanged);
 				Height = Math.Max(Height, .001);
 				Diameter = Math.Max(Diameter, .1);
 
@@ -168,9 +168,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Primitives/HalfCylinderObject3D.cs b/MatterControlLib/DesignTools/Primitives/HalfCylinderObject3D.cs
index 4d3fbd412..a857edfa5 100644
--- a/MatterControlLib/DesignTools/Primitives/HalfCylinderObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/HalfCylinderObject3D.cs
@@ -74,10 +74,10 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 			using (RebuildLock())
 			{
-				Sides = agg_basics.Clamp(Sides, 3, 180, ref changed);
+				Sides = agg_basics.Clamp(Sides, 3, 180, ref valuesChanged);
 				using (new CenterAndHeightMantainer(this))
 				{
 					var path = new VertexStorage();
@@ -96,9 +96,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Primitives/HalfSphereObject3D.cs b/MatterControlLib/DesignTools/Primitives/HalfSphereObject3D.cs
index 50e3cc60b..bdec312fc 100644
--- a/MatterControlLib/DesignTools/Primitives/HalfSphereObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/HalfSphereObject3D.cs
@@ -82,11 +82,11 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 			using (RebuildLock())
 			{
-				LatitudeSides = agg_basics.Clamp(LatitudeSides, 3, 180, ref changed);
-				LongitudeSides = agg_basics.Clamp(LongitudeSides, 3, 360, ref changed);
+				LatitudeSides = agg_basics.Clamp(LatitudeSides, 3, 180, ref valuesChanged);
+				LongitudeSides = agg_basics.Clamp(LongitudeSides, 3, 360, ref valuesChanged);
 
 				using (new CenterAndHeightMantainer(this))
 				{
@@ -107,9 +107,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Primitives/RingObject3D.cs b/MatterControlLib/DesignTools/Primitives/RingObject3D.cs
index 1972207e1..2ad61471a 100644
--- a/MatterControlLib/DesignTools/Primitives/RingObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/RingObject3D.cs
@@ -94,11 +94,11 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 			using (RebuildLock())
 			{
-				InnerDiameter = agg_basics.Clamp(InnerDiameter, 0, OuterDiameter - .1, ref changed);
-				Sides = agg_basics.Clamp(Sides, 3, 360, ref changed);
+				InnerDiameter = agg_basics.Clamp(InnerDiameter, 0, OuterDiameter - .1, ref valuesChanged);
+				Sides = agg_basics.Clamp(Sides, 3, 360, ref valuesChanged);
 
 				using (new CenterAndHeightMantainer(this))
 				{
@@ -126,9 +126,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Primitives/SphereObject3D.cs b/MatterControlLib/DesignTools/Primitives/SphereObject3D.cs
index 32766b0c8..b0670c8a0 100644
--- a/MatterControlLib/DesignTools/Primitives/SphereObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/SphereObject3D.cs
@@ -89,11 +89,11 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 			using (RebuildLock())
 			{
-				Sides = agg_basics.Clamp(Sides, 3, 360, ref changed);
-				LatitudeSides = agg_basics.Clamp(LatitudeSides, 3, 360, ref changed);
+				Sides = agg_basics.Clamp(Sides, 3, 360, ref valuesChanged);
+				LatitudeSides = agg_basics.Clamp(LatitudeSides, 3, 360, ref valuesChanged);
 
 				using (new CenterAndHeightMantainer(this))
 				{
@@ -130,9 +130,9 @@ namespace MatterHackers.MatterControl.DesignTools
 
 			Invalidate(InvalidateType.Mesh);
 
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/Primitives/TorusObject3D.cs b/MatterControlLib/DesignTools/Primitives/TorusObject3D.cs
index d467a1650..65de5a3c9 100644
--- a/MatterControlLib/DesignTools/Primitives/TorusObject3D.cs
+++ b/MatterControlLib/DesignTools/Primitives/TorusObject3D.cs
@@ -80,12 +80,12 @@ namespace MatterHackers.MatterControl.DesignTools
 		override public Task Rebuild()
 		{
 			this.DebugDepth("Rebuild");
-			bool changed = false;
+			bool valuesChanged = false;
 			using (RebuildLock())
 			{
-				InnerDiameter = agg_basics.Clamp(InnerDiameter, 0, OuterDiameter - .1, ref changed);
-				Sides = agg_basics.Clamp(Sides, 3, 360, ref changed);
-				RingSides = agg_basics.Clamp(RingSides, 3, 360, ref changed);
+				InnerDiameter = agg_basics.Clamp(InnerDiameter, 0, OuterDiameter - .1, ref valuesChanged);
+				Sides = agg_basics.Clamp(Sides, 3, 360, ref valuesChanged);
+				RingSides = agg_basics.Clamp(RingSides, 3, 360, ref valuesChanged);
 
 				var ringSides = RingSides;
 				var startingAngle = StartingAngle;
@@ -126,9 +126,9 @@ namespace MatterHackers.MatterControl.DesignTools
 			}
 
 			Invalidate(InvalidateType.Mesh);
-			if (changed)
+			if (valuesChanged)
 			{
-				Invalidate(InvalidateType.Properties);
+				Invalidate(InvalidateType.DisplayValues);
 			}
 
 			return Task.CompletedTask;
diff --git a/MatterControlLib/DesignTools/PublicPropertyEditor.cs b/MatterControlLib/DesignTools/PublicPropertyEditor.cs
index fc50a1e03..f7d13c5de 100644
--- a/MatterControlLib/DesignTools/PublicPropertyEditor.cs
+++ b/MatterControlLib/DesignTools/PublicPropertyEditor.cs
@@ -346,7 +346,7 @@ namespace MatterHackers.MatterControl.DesignTools
 
 				void RefreshField(object s, InvalidateArgs e)
 				{
-					if (e.InvalidateType.HasFlag(InvalidateType.Properties))
+					if (e.InvalidateType.HasFlag(InvalidateType.DisplayValues))
 					{
 						double newValue = (double)property.Value;
 						if (newValue != field.DoubleValue)
@@ -534,7 +534,7 @@ namespace MatterHackers.MatterControl.DesignTools
 
 				void RefreshField(object s, InvalidateArgs e)
 				{
-					if (e.InvalidateType.HasFlag(InvalidateType.Properties))
+					if (e.InvalidateType.HasFlag(InvalidateType.DisplayValues))
 					{
 						int newValue = (int)property.Value;
 						if (newValue != field.IntValue)
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index e21b8ae78..30f02c214 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit e21b8ae783c82aa8ee8778bbc91a7014a86575ad
+Subproject commit 30f02c2147314cec77f699dab2efc4d881f18efa