Summary

• ".FCStd" is the original FreeCAD file
• ".amf" is the 3D-model exported from FreeCAD
• ".3mf" is the PrusaSlicer project settings that I used
• ".gcode" is what I used for my print on a Prusa Mini with 3DJAKE ecoPLA Ultra-Satin Gold

Replacement for the rubberized knobs on the Arturia Microbrute analog synthesizer, which become sticky after some time.
To replacte the wheels and the octave buttons, you need to disassemple the Microbrute, but it was not too difficult. I have added some pictures of the process and the inside.
I suggest to print one part of each type first and try out the fit. It might depend on your printer if the knobs are good or too loose or too tight. For the surfaces of the parts I used the "fuzzy skin" setting of the slicer.