row_2 = row_1 + vertical_space/7; row_6 = row_5 + vertical_space/7; cv_in_1a = [left_col, row_3, 0]; pwm_duty = [second_col, second_row, 0]; //Third row interface placement f_tune = [width_mm/2 + h_margin, top_row, 0]; left_rib_x = thickness of 2mm thickness = 2; // plastic walls are 2mm clf_shaft_diameter = 6.3; // the third number in this measurement. // Shape of top of knob. "Recessed" type can.