row_2 = row_1 + v_margin + 12; row_2 = row_1 + vertical_space/7; row_7 = row_6 + vertical_space/7; cv_in_1a = [left_col, row_1, 0]; square_out = [width_mm-h_margin, row_1, 0]; pwm_in = [input_column + h_margin/2, bottom_row, 0]; c_tune = [second_col, third_row, 0]; saw_out = [output_column, row_1, 0]; f_tune = [width_mm/2 + h_margin.