A tray and cover to protect the CPU pins on the Linus Tech Tips recycled CPU fidget spinner with holes in place to still be able to spin the fidget while protected as well as thumb holds to make it easily removable. It's a friction fit so you don't need the cover, you can just print the tray to protect the pins. On occasions when you want to ensure protection, you can add the cover. The hole is centered in the model so any wiggle room when spinning the fidget indicates either slight print extrusion errors or imperfect centering on the fidget itself.

I always print on a raft to not get an imprint of my print bed but I suspect most people won't need to do so.

PLA - No supports needed. Infill 20% (doesn't matter). 0.4mm Nozzle

I recommend slice to 'Super Quality' 0.12mm.