row_2 = working_increment*1 + row_1; row_4 = row_3 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_3 = row_2 + vertical_space/7; row_4 = working_increment*3 + out_row_1; out_row_6 = out_working_increment*5 + out_row_1; out_row_4 = out_working_increment*3 + out_row_1; out_row_4 = out_working_increment*3 + out_row_1; out_row_3 = out_working_increment*2 + out_row_1; //special-case the knob main shape. [mm] /* [Stem (optional)] */ .