After an extensive amount of filing on the coin slot opening in the skins, it was time to shim, bolt and JB Weld the screw heads into the skin. Here's the pieces....an 1.5 inch 4-40 screw with a flat head, aluminum spacer, lock washer and nut.
Here's how it looks pieced together.
I mixed some JB Weld and applied a blob to each screw head, then slowly placed the piece into the skins, which I had laying face down. The coinslots aren't supposed to stick out too far...and since they are on a rounded surface, you have to tweak and adjust accordingly.