Goldstar 3DO Drive Tray Gear Shaft

This is a replacement for the frequently broken part of the Goldstar 3DO drive tray eject mechanism. If your Goldstar 3DO has trouble ejecting, chances are that the tabs on the top of the factory part have broken off, leading to misalignment of the gears and a slow or stuck drive tray. Print with 100% infill out of PLA, PLA+, PA6 (Nylon), or similar. I recommend a skirt/brim to get better bed adhesion since it's a very small part. You shouldn't need supports. If you print it out of PA6, anneal the print to make it stronger/stiffer. PLA or PLA+ should be fine though since it's a pretty low wear part. You likely will need to bore out the inside diameter slightly to fit the mounting post. I left the tolerances tight so that I would have a thicker wall when printing for a stronger part. Use a 5/32 drill bit and spin the part while drilling to shave a little bit off the ID and you should be good to go. If you want an absolutely perfect fit, trim the fillet off the bottom of the upper tabs with a razor, but it works fine without trimming them.