What does it take to get the full range of motion that I need? Marty was a big help yesterday at the end of the day, and put the flipper arm on the mill and showed me how to manually cut the slot at an angle that would allow the armature to move through the full intended range of motion. He also suggested trying to model the whole mechanism in CAD as that would show me problems like this before they are made. And he’s totally right. I modeled each part separately, but never even tried, even in 2D, to model them together. So I copied the components, changed them each to a separate color, and put them together in one file. Now I clearly see the change I need to make in the flipper arm file to support the motion that I require.