Alternative moon disc stem with thread to attach the lamp room to so that it doesn't rattle around inside. This makes the puzzle easier and a bit fairer, since normally the lamp room rattling around obfuscates the sounds of the pin. The shaft of the stem has been chamfered so it can be printed upside down without supports.
The author remixed this model. Imported from Thingiverse.
Added threaded holder to the moon disk stem.