Parametric Stove/Amp Knob

Couldn't find a suitable replacement knob for a camper cooktop.

Supports are better than what the slicer provides and cut off easily with a paring knife.

Could work for anything needing a knob for a flattened or round shaft. With a little noodling in the scad you could also do a square shaft (decrease the cut to zero and change the $fn for the shaft hole to 4, or replace it with a cube).

If you're having a tough time getting the exact shaft diameter and cut right, you can experiment with the shaft_test.scad file and print test fittings to try on your existing shaft: it prints in a few minutes and uses very little filament.

Happy Printing...