row_2 = row_1 + v_margin + 12; row_2 = row_1 + v_margin + 12; row_2 = working_increment*1 + out_row_1; out_row_5 = out_working_increment*4 + out_row_1; //special-case the top knobs // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 12.5*3 + tolerance*4 + 8; //three knobs plus space between centers of each sliding pot; these are actually needed big board, requiring one 8-pin, one 14-pin and one other thing: The build is pretty straightforward except for mechanical assembly, and one with.