And here it is, minus the cover.

Exploded

• Came in at <tape width> + 4mm.
• Drives the tape with a sprocket, on the release stroke of the feed lever.
• Supports the tape up against the cover window from both edges, and centers it.
• Removes the cover tape and has an integral slipper clutch that you can adjust the tension of.
• Supports tapes up to 8mm depth with no adjustments.  Supports tapes up to 24mm wide by changing 2 parts, which are parameterized.  Tapes with feed holes on both edges are supported.
• All cams and ratchets are spring loaded and positive acting (force on them engages them more).
• Travel stop is adjustable.
• For hardware, it requires 2 skateboard bearings, 4 M3 bolts, 2 M3 nuts, one O-ring, and a binder clip.

And.. It will all print flat with no overhangs, minus the connecting rod cutout.  I may just make that a through.

I'm so happy with this I can hardly stand it.