DIY Tip of the Day: Cabinet Assembly Station. Here’s a third hand that will ensure square, no-hassle cabinet assemblies. Cut four 7-in. long 2x6s and screw or nail them to a plywood base, leaving exactly square crisscross channels just wide enough for the cabinet parts to fit in snugly. When you assemble the cabinet, the station will keep the parts vertical and aligned while you apply glue or pound in nails.