Road Show lock solenoid pin (Williams A-18818/03-9235 compatible)

This is a modified, from scratch design of Road Show pinball machine's locking pin. The collar at the end of the part typically breaks, which either causes the return spring to jam the part or the part just goes too far for the coil to be able to pull it back.

This part requires the metal plunger from the original failed part. Carefully hammer the plunger's pin out, remove the old plastic part, insert this and hammer the pin back in place.

It is highly recommended to use ASA or ABS for this part. PLA or PETG won't last.

Print it with the long flat side down with supports, so the small hole for the pin is in the Z axis. Do not print it sideways. Very small layers are recommended to prevent warping, I used 0.1mm, YMMV. Sand the side that had supports as needed.

There's two variants, one is hollow from the bottom like the original. Most machines these days are missing the tiny metal flap that holds this piece in place and in those the non-hollow version is most likely better. If unsure, make the hollow one.