I lost my Cadet in wall heater knob to adjust the temperature so I made a new one out of PLA on my Simple Metal. Only took about 15 minutes to print @ 190C with 50% infill. I then drilled out the hollow shaft larger to fit the shaft onto the heater (Just used a cheap hand drill and a 9/32 wood bit). Object made in TinkercadPrinted on a simple metal and sliced in CURA (amf file is attached too if you have my same setup) I used White HatchboxPLA- 190C with 50% infill. Drilled out hollow shaft with a wood drill bit (9/32 bit worked perfectly) Just pushed in hard while twisting the knob on.