This is my model of secret stash compartment, for storing all kinds of stuff, and it can also be used as a keychain. Trigger needs to be glued on the top for better adhesion.
Print setting: 0.2 layer height, 3 walls, 3 top/bottom layers, 10% rectlinear infill.

As for orientation print “base G” vertical, with the tree supports only inside (set the treshold to 8 deg or so)

“thread” also print vertically, and “trigger” should be printed horizontally, with the supports on (snug support)

Orientations are set up and available in 3mf here.

Adviced material, PLA.