row_2 = row_1 + v_margin + 12; row_1 = vertical_space/7; row_2 = working_increment*1 + out_row_1; out_row_3 = out_working_increment*2 + out_row_1; out_row_7 = working_increment*6 + out_row_1; out_row_4 = out_working_increment*3 + out_row_1; out_row_5 = working_increment*4 + row_1; //special-case the knob body. [mm] external_indicator_height = 11; // Length of the Pelorinho