Summary

Just a cute printer demo.
Rotate to print with the cutout points up so that no support is required. Printed in PLA at 0.2 resolution.
Insert a filament change with CURA at layer 148, so you can insert the quarter before continuing (CURA retracts the filament all the way out of the extruder at the change command, so be sure to reinsert it before restarting).
Added new mk2 version with a keyring loop