I made this keycap for the thumb keys on my Atreus.

I recommend printing with a 0.25 or 0.2 nozzle and layer height of 0.1.

When printing with a 0.4 nozzle you may run into issues with the thin parts of the stem, make sure to have arachne enabled in the slicer and maybe reduce print speed.

The stem is cylindrical - and therefore hard to print - because it needs to fit into Kailh Silent switches which have a cylinder shroud around the stem. Most keycap models you find for 3D printing have a big cubic stem which makes it easier to print with FDM printers, but that was not an option for me.

The “precise” models have a tighter fit MX cross recess (dimensions match the specification) that might be of use if you use a resin printer. Both models come with adhesion helpers and without.