I designed a Parametric knob for potentiometers in fusion 360 and then i saw this contest coming up. so i dove into openscad and since i never worked with openscad before it was blood, sweat and a lot of tears. this came out eventually.
i hope you can put my design to good use….

Adjustments you can make:

• height
• width
• smoothness
• flatted shaft (yes/no)
• adjust the flatted face placement
• width of the shaft
• set screw (yes/no)
• size of the screw
• placement of the set screw
• hollow space underneath (yes/no)
• depth of the hollow space
• wall thickness of the hollow space
• grip on button (yes/no)
• width of the indents (top/bottom)
• starting angle of the indents
• placement of the indents
• smoothing of the edges

always check your outcome before printing ;)

if you set the heigt of you setscrew in the middle of the hollow space you cannot use the setscrew.

i added two profiles, for a more premium feel go for the 100% infill version.
(45mm knop flatted shaft and no set screw, it is a snugg fit.)

if you like the Fusion 360 model better you can find that one here:
https://makerworld.com/en/models/471841#profileId-381532

or check out my other models:

https://makerworld.com/en/@LickyLauda