Made the 1:1 gears to power the cam and made a new rail system for the ring. Today was really productive, here’s what I did:

• initially, I messed with a lot of the dimensioning and spacing with the rails on the outside. I realized there’s no way it was gonna work, and even if it could, it would take up tons of space. I needed a better solution.
• Having the rails on the outside makes everything really big which doesn’t fit. I figured out a way to add a rail inside the tube. Instead of the ring being constrained to a rail, the inside thick square piece is constrained to a rail. This leaves tons of space on the outside for gears (almost 6mm of space on each side).
• I finally added the gears. I had 6mm of space which is more than enough. However, the gears hit the bearings that track the ring, so I’ll probably end up making the ring bigger either way. Another terrible thing is that the gears hit the blue piece. It actually goes far enough to cut into the bearing. Either I shift into smaller bearings, or I change the spacing between the gears. I still have to decide which on to do.

I don’t think I’ll be building this version in hopes of coming up with a way to use one-way bearings.