The idea was shamelessly stolen from https://www.printables.com/model/240252-ultimate-printer-knob-upgrade-the-best-knob-of-bot but written from the ground up in SCAD, and only has been tested for the MK4.
Prints with no supports. I used a 0.4mm nozzle and 15% infill. I had one print fail which can easily be solved by using a brim.
The author marked this model as their own original creation.