I liked the original design but wanted to print in 2 colors so I modified to print the Tardis with no windows and print the knob in white and show through the openings.
Added a V2 of the knob which has tighter tolerances at the part that slips over the stepper shaft to help prevent stripping. Recommended to print with at least 3 out walls.
Extruder_Knob.stl | 184.6KB | |
Extruder_Knobv2.stl | 206.5KB | |
Extruder_Knob_Tardis.stl | 39.8KB |