I have a Prusa MINI and could not print the full sized wall mount. So, I remixed this model to accomplish two things:
You will need a M5 25 mm screw and M5 nut to join the upper part to the knob.
NB: the lower part does not print well horizontally due to overhang issues. Printing it vertically works great. If you download the 'complete' file (.gcode), everything will be set up for you to print the two mounts for one rail (upper part, knob, and lower part) on a MINI.
If you choose to print the lower parts separately, rotate them in PrusaSlicer 90 degrees in the Y plane to make them vertical.
This is functional, not pretty. 0.25mm DRAFT mode with 20% infill works great. I recommend PETG for strength.
Enjoy!
The author remixed this model.