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Means ~$16-20 in parts, depending on PCB Fireball/Fireball.kicad_sch | 4 // preview[view:northwest, tilt:bottomdiagonal] /* [default values for el-cheapo hotpoint gas dryer timer potentiometer knob] */ // Enable rounding of the hole on the top edge radius circle_height = 1; // [0:No, 1:Yes] TaperAngle=asin(KnobHeight / (sqrt(pow(KnobHeight, 2) + pow(KnobMajorRadius-KnobMinorRadius,2)))) - 90; DivotRadius = KnobMinorRadius*.4; // Primary knob cylinder for (i=[0 : RingMarkings-1] rotate([0.

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