I printed this knob with 4 perimeters, and 30% infill. Seems to work fine. It's a plastic knob next to fire, so obviously plan for a failure… which you should have done already since the original ones have plastic stems and those fail too. I used “JAYO Silver Silk PLA” for mine in the photo, and it's impossible to tell, obviously, because it's perfect.
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The author marked this model as their own original creation.