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Cylinder(r1=KnobMajorRadius + RingWidth, r2=KnobMinorRadius, h=RingThickness, $fn=50, center=true); if (RingWidth>0 cylinder(r1=KnobMajorRadius + RingWidth, r2=KnobMinorRadius, h=RingThickness, $fn=50, center=true); if (RingMarkings>0 for (i=[0 : RingMarkings-1] rotate([0, 0, 180] // Left side: meta-step controls } module shape(hsh, ird, ord, fn4, hg) { x0= 0; x1 = hsh > 0 ? Ird : ord; x2 = hsh > 0 ? Ird : ord; x2 = hsh > 0 ? Ord : ird; y0=-0.1; y1=0; y2=abs(hsh); y3=hg-abs(hsh); y4=hg; y5=hg+0.1; if ( hsh >= 0 } module rail(height) { difference() { difference() { union() { z_position = height - 25; // build up seven rows; middle one unused row_7 = row_6 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_4 = row_3 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_5 = row_4 + vertical_space/7; row_7 = row_6 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_4 = row_3 + vertical_space/7; row_5 = row_4 + vertical_space/7; row_3 = row_2 + vertical_space/7; cv_in_1a = [left_col, row_3, 0]; pwm_duty = [second_col, fourth_row, 0]; triangle_out = [third_col, third_row, 0]; //Fourth row interface placement pwm_in = [input_column + h_margin/2, bottom_row, 0]; fm_in = [h_margin+working_width/8, row_3, 0]; pwm_duty = [second_col, second_row, 0]; //Third row interface placement f_tune = [second_col, third_row, 0]; fm_lvl = [h_margin+working_width/8, row_4, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_2, 0]; fm_in = [first_col, first_row, 0]; //Second row interface placement f_tune = [h_margin+working_width/8, row_2, 0]; audio_in_2 = [left_col, row_3, 0]; c_tune = [width_mm/2 - h_margin, top_row, 0]; left_rib_x = thickness * 1; right_rib_x = width_mm - col_right; // column from.

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