The resolution of the Davinci 3D printer allowed me to make some custom bullet shell bases for an XBOX controller. This lets you replace the plastic buttons with these unique bullet casing shells and still operate the controller.
The shells are empty and just needed an insert to hold the bullet shell in-place inside the controller shell. A few measurements of the original buttons and their unique aligned tabs gave me what I needed to create the inserts with TinkerCad software.
TinkerCad and the Davinci 3D printer work well together. I can produce a prototype in short order with decent precision. I printed these at 0.2 mm height layer and 30% fill. This is the "Excellent" mode in Davinci 3D software setting.