Clamp Knob (M4) for Fixit Fixturing System

Intended for use with https://www.printables.com/model/1262772-fixit-fixturing-system-v1-boards They're large enough to give significant mechanical advantage when finger-tightening, but small enough to fit two per clamp, and won't get in the way of your boards. Printing ≤.25mm layers 15% infill no supports, but brim might be a good idea if you're printing a bunch at once PETG Usage Place a M4 nut on a hard surface Push the knob onto the nut Thread two knobs at a time onto a M4 screw, with the threading facing out Turn the knobs against each other to fully seat the nuts