The keycaps' shape is inspired by Andrey Kalmatskiy project "32xe".
Not everyone can print rinse-away support structures, so for the best printing results and ease of post-processing the stems were separated from the tops. Each cap can be freed from the support structure with just two moves of a 6-mm wood chisel, then the stem is glued in place with a drop of Superglue.
For the buttons and the joystick caps, 0.1 mm step is used. With my printer, I saw no significant improvement by moving to 0.06 mm step, at the price of making the prints slower (and probably less robust).