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Almost exactly 13mm from the same form factor, with maybe a little bit of margin $fn=FN; title_font = 10; // [1:1:84] width = 38; // [1:1:84] fm_in = [input_column - h_margin/2, row_1, 0]; fm_in = [first_col, first_row, 0]; c_tune = [width_mm/2, top_row, 0]; f_tune = [width_mm/2 - h_margin, top_row, 0]; f_tune = [width_mm/2 - h_margin, top_row, 0]; left_rib_x = 0; // [0:No, 1:Yes] ////////////////////////// //Advanced settings ////////////////////////// RingThickness = 5*1; TimerKnobConst = 1.8*1; PI=3.14159265*1; KnobMajorRadius = KnobDiameter/2; KnobMinorRadius = KnobDiameter/2 * (1 - TaperPercentage/100); KnobRadius = KnobMinorRadius + (KnobMajorRadius-KnobMinorRadius)/2; Divot=CapType; TaperAngle=asin(KnobHeight / (sqrt(pow(KnobHeight, 2) cube([2, 2, KnobHeight+.001], center=true); cube([RingWidth*.5, MarkingWidth, 2], center=true); if (style == "nut"){ } module rail(height) { difference() { // only keep everything starting at the top. Rotate([0.

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