Barrel Cooper's Puzzle: M3x40+square nut
thingiverse
Very important, related to my hardware stash: The length of the M3 bolt can be reduced to 40mm rather than the proposed 70mm. I used the "negative volume" adjuster of PrusaSlicer to modifiy the interlocking pins: 1. widen the opening in one of them 2. foresee a slot to slide in a square nut As a result the bolt, nut and spring are hidden in the part. Full make coming soon. PS: the preview in Thingiverse doesn't show the negative volumes. The easiest is to import he 3mf in PrusaSlic3r. Also Cura does show the different parts correctly (split object via the mesh tools into and parts and go from there)
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