diff --git a/MatterControl.OpenGL/GCodeRenderer/ExtrusionColors.cs b/MatterControl.OpenGL/GCodeRenderer/ExtrusionColors.cs
index ba360e933..3fc7484d7 100644
--- a/MatterControl.OpenGL/GCodeRenderer/ExtrusionColors.cs
+++ b/MatterControl.OpenGL/GCodeRenderer/ExtrusionColors.cs
@@ -1,6 +1,4 @@
-using MatterHackers.Agg;
-
-/*
+/*
 Copyright (c) 2014, Lars Brubaker
 All rights reserved.
 
@@ -31,6 +29,7 @@ either expressed or implied, of the FreeBSD Project.
 
 using System.Collections.Generic;
 using System.Linq;
+using MatterHackers.Agg;
 
 namespace MatterHackers.GCodeVisualizer
 {
diff --git a/MatterControl.csproj b/MatterControl.csproj
index 3ac1aa11c..9652d3f7b 100644
--- a/MatterControl.csproj
+++ b/MatterControl.csproj
@@ -264,7 +264,7 @@
     <Compile Include="SetupWizard\InputBoxPage.cs" />
     <Compile Include="LocalizedString.cs" />
     <Compile Include="PartPreviewWindow\BedSettings.cs" />
-    <Compile Include="PartPreviewWindow\ColorGradientWidget.cs" />
+    <Compile Include="PartPreviewWindow\SpeedsLegend.cs" />
     <Compile Include="PartPreviewWindow\PartPreviewContent.cs" />
     <Compile Include="PartPreviewWindow\View3D\DebugBvh.cs" />
     <Compile Include="PartPreviewWindow\View3D\UndoCommands\UngroupCommand.cs" />
diff --git a/PartPreviewWindow/ColorGradientWidget.cs b/PartPreviewWindow/SpeedsLegend.cs
similarity index 53%
rename from PartPreviewWindow/ColorGradientWidget.cs
rename to PartPreviewWindow/SpeedsLegend.cs
index fd4c8826d..f6d46160d 100644
--- a/PartPreviewWindow/ColorGradientWidget.cs
+++ b/PartPreviewWindow/SpeedsLegend.cs
@@ -1,4 +1,33 @@
-using System;
+/*
+Copyright (c) 2017, Lars Brubaker, John Lewin
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The views and conclusions contained in the software and documentation are those
+of the authors and should not be interpreted as representing official policies,
+either expressed or implied, of the FreeBSD Project.
+*/
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using MatterHackers.Agg;
@@ -7,9 +36,9 @@ using MatterHackers.GCodeVisualizer;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow
 {
-	public class ColorGradientWidget : FlowLayoutWidget
+	public class SpeedsLegend : FlowLayoutWidget
 	{
-		public ColorGradientWidget(GCodeFile gcodeFileTest, ThemeConfig theme, int pointSize)
+		public SpeedsLegend(GCodeFile gcodeFileTest, ThemeConfig theme, int pointSize)
 			: base(FlowDirection.TopToBottom)
 		{
 			HashSet<float> speeds = new HashSet<float>();
@@ -59,7 +88,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				int feedrate = rangeValues[i];
 
 				this.AddChild(
-					new ColorToSpeedWidget(speedColors[i], millimetersPerSecond: feedrate / 60, pointSize: pointSize)
+					new SpeedLegendRow(speedColors[i], millimetersPerSecond: feedrate / 60, pointSize: pointSize)
 					{
 						Margin = new BorderDouble(2),
 						HAnchor = HAnchor.Stretch
@@ -67,9 +96,9 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			}
 		}
 
-		public class ColorToSpeedWidget : FlowLayoutWidget
+		private class SpeedLegendRow : FlowLayoutWidget
 		{
-			public ColorToSpeedWidget(RGBA_Bytes color, double millimetersPerSecond, int pointSize)
+			public SpeedLegendRow(RGBA_Bytes color, double millimetersPerSecond, int pointSize)
 				: base(FlowDirection.LeftToRight)
 			{
 				this.AddChild(
diff --git a/PartPreviewWindow/ViewGcodeBasic.cs b/PartPreviewWindow/ViewGcodeBasic.cs
index c3e9b3bef..d0587b78c 100644
--- a/PartPreviewWindow/ViewGcodeBasic.cs
+++ b/PartPreviewWindow/ViewGcodeBasic.cs
@@ -110,7 +110,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 					new SectionWidget(
 						"Speeds".Localize(),
 						ActiveTheme.Instance.PrimaryTextColor,
-						new ColorGradientWidget(sceneContext.LoadedGCode, theme, pointSize: 12)
+						new SpeedsLegend(sceneContext.LoadedGCode, theme, pointSize: 12)
 						{
 							HAnchor = HAnchor.Stretch,
 							Visible = sceneContext.RendererOptions.RenderSpeeds,