Master System D Pad 3D Printed Repair (with video)

I spotted this Master System on eBay, and given my current hhhhhobby is trying to unbreak electronics, I bought it!

The control pad was missing the d-pad (excuse potato photo):

So I took it apart and cleaned the plastics with soap and water, and the electronics with isopropyl alcohol (IPA):

But what to do about the missing d-pad?

3d printer (which I’ve been a bit scared of in the past!) to the rescue! I found an .stl (which I choose to think of like Warhammer 40k STCs) of the very d pad! It’s available on thingiverse.

The component took about 2.5 hours to print on my Elegoo Mars 2p printer:

The component looks like this:

The finished result looks a tiny bit odd!

I got the kids to test it and it works OK - except that the UP button isn’t working. I don’t think that’s anything to do with the new d-pad; I will strip it down and double check the button contacts under my microscope; I might need to try to rebuild the traces. Uh oh! I have a Megadrive controller with the same problem, so I better get good at this!