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DO NOT MAKE THIS. It doesn't work.
- The maker forgot one of the important parts, the ratcheting tooth that allows you to wind the mechanism.
- The changes he made make it impossible to assemble the damn thing. Missing holes, parts too big
- When you modify it so that it actually does go together, it doesn't work. Bad tolerances, poor clearances, the whole thing just is a piece of crap.

You might try printing the original version of this model, from Larkys on Thingiverse. But don't print this piece of crap.