Some scrap metal I'm going to use for the coin returns. These are just pieces cut out of the skins that have no actual purpose for R2.
This is the drawing I made in Adobe Illustrator of the coin return innards.
Here is a paper prototype I made for the innards of the coin return. I didn't get it right the first time, but nailed it the second time.
I put another coat of primer on the back door.
After a few hours of filing, grinding, and measuring, I have these. Overall the shape is really nice, and I'm quite pleased with them. But because they got handled so much, the surface is not quite where it needs to be. But for a part that is so insignificant in the overall R2 appearance, I'm not that worried about it.