Two pieces of 2x4, 2' long with slots 1/4" wide cut in the center about 1" deep. Setting tape completely around the glass, one joint, centered at the top of the glass. Set the glass in the slots, top or straight side down. The frame is tapered, will slide on with a little water/dish soap lube. When fully seated turn the assembly upright and install the top section. This worked quite well for a 31 WS, not sure about other years. Trim the excess tape with razor blade and exacto knofe. No damage to the paint on the frame.