Manfrotto quick release plate
thingiverse
Some Manfrotto-style quick-release plates are available, and I believe the original part is the 501PL. Updated models (V2) feature an easier locking mechanism into place. Print Settings: Infill: 50-100% Notes: Print one plate with an extra grip pattern or without it. If you're able to print flexible filament, try printing "Rubber hole lid.stl." Otherwise, print "plastic hole lid.stl" to secure the screw in place. You can also mount non-camera items by printing "Quick release M3.stl," which has a square pattern with holes for M3 screws. The hole pattern is 30x50mm.
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