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Great design and video!
I'm having problems with to tight clearances, I use PLA, Cura and a wanhoo i3, 0.2 thickness for gear and sliding jaw, and 0.3 for the rest.
the slider sticks to the base and wont slide, the gears sticks on the rods if I can get them on, and I don't need the pins since the base parts sticks hard to each other.
Any hints on what I'm doing wrong? do I need to post process the parts?