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I printed all the parts for page 1 (the Mainspring Assembly), but can't get them to fit together. It seems like either the square part of the Ratchet is just a little too big, or the matching holes on the other parts are too small. I was able to get the spring on there by forcing it with a hammer, but there's no way I'll be able to get the winding stem on there.

Any advice? Is there an easy way to print that lug a little smaller without affecting the rest of the piece?