Remixed from https://www.printables.com/model/281298-dood-waveshare-rp2040-zero-super-slim-case and the Pimoroni trackball top shell.

hardware inside is the Pimoroni trackball and a Waveshare 2040. I soldered all connections with magnet wire, and may regret it later.

I heat inset m2.7 nuts and used 6mm length screws.

I have yet to actually program the mouse, and will update here if I do.

pics incoming shortly.