row_2 = row_1 + v_margin + 12; //knob_radius top_row = height - 25; // build up seven rows; middle one unused row_7 = row_6 + vertical_space/7; row_5 = working_increment*4 + row_1; row_3 = row_2 + vertical_space/7; cv_in_1a = [left_col, row_7, 0]; cv_in_1b = [right_col, row_1, 0]; fm_pot = [input_column + h_margin/2, bottom_row, 0]; pwm_duty = [input_column, row_2, 0]; fm_lvl = [second_col, third_row, 0]; fm_in = [input_column - h_margin/2, row_1, 0]; right_rib_x = width_mm - thickness*2; union() { difference() { union() { shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); module shape(hsh, ird, ord, fn4, hg x0= 0; x1 = hsh > 0 ? Ird : ord; x2 = hsh > 0 ? Ird : ord; x2 = 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 .