The is the holder for Bluetooth Remote Phone Camera Controller Shutter, which helps to make timelapse videos, just modify the G-Code for insert at the layer change.

Print in place model

Printing:

Ring - Infil to add weight, supports needed for spade inset. Letter embossing doesn't need it. Spade - Infil to add weight, no supports Letters - Print flat, already scaled to fit nicely in the embossing Star - Infil to add weight.

Full print with 4x4x4 walls/top/bottom and 20% infill came to about 40g in weight.