Rigid cuffs
thingiverse
Rigid-fiddle cuffs. Use 3 x M3x20mm hex bolts, with M3 nylock nuts for the hinges. The locking pin can use the same fasteners, but a regular M3 nut can be used for quick fastening and release. The stems between a and b parts are hollow to allow for a 6mm wooden dowel to increase the joint strength.
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