The arm of the Elenco Snap Circuit hand crank broke, item# HC. Designed this replacement. The pin holding it to the spindle was missing. Took a large binder clip and cut a straight section out with a Dremel. Looked to be a perfect fit. Using a drill bit I bored out the holes by hand.
Could probably ease up on the infill.
Print on its side with supports.
Original crank arm
New crank arm installed