It is done! I will have a video showing the whole build coming soon. I ran into a bunch of stupid issues that I had to work through as I built. So you get to learn from my mistakes ahead of time.

My favorite thing is that the whole prop looks like it is made from solid metal. The prop is also heavy! It weighs 0.64 kg or 1.42 lbs. The aluminum tape method worked well .However it was quite tricky and tedious. I had to do re-apply it a few times to get the exact look that I wanted.

The USB Joystick function works great, nice and smooth once properly calibrated. The pins on the PCB are exposed on the bottom side. So if someone wants to add this design to a functional Razor Crest cockpit mock-up, you can wire in a few other switches to the spare pins.

My design is released as Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) similar to E Williams original on this thread. The design files are on Google Drive, and the BOM is on Google Sheets.

If your interested here are the issues I ran into during the build:

1. The Dewalt metal taps from Home Depot can't handle stainless steel. I only got 1 hole done before it broke.
2. Solder the wires to the potentiometer before the Trinket M0. (Design updated to make this a bit easier)
3. Test your potentiometer for any dead spots before final assembly. (Order a few spares)
4. I forgot that the gear inverts the rotation during testing. (This was an easy software fix)
5. Age more aluminum tape than you need. Applying it is tricky.
6. Take great care to center the main shaft so it doesn't rub on one side or the other. (I updated the design with a bit more tolerance)
7. Use E6000 glue instead of hot-glue to prevent metal on metal rattling.