More incontrovertible proof that nothing's easy when it comes to building R2. I had another try at making a coin return, and this one turned out somewhat better than yesterday's attempt. I found some thinner aluminum at Ace Hardware. It was ducting, but the coin returns are small enough that the curve doesn't really come into effect. I'm just making the inset piece, not the frame so far.
By the way, these are built using Chris Lee's extremely helpful tutorial, Making aluminum coin returns.
I have a feeling there are going to be several attempts to get them right. (It would probably help if I started working on them before 10:30pm too.)