Place the glued sash extrusion (668PN011) into the rear door sash assembly glue jig. (Jig number 4000-038) Locate in one end of the sash first, down onto the nylon pads on the jig and then toggle clamp in place with the end of the extrusion pushed up against the all-thread stop. At the other end of the sash bend it around to also locate to the all-thread stop at the other end and toggle clamp it in place