I have a 1950s/60s Kaywoodie brier pipe that has the threaded female mortise insert loose. When I attempt to unscrew the stem from the bowl, the metal insert will try to unscrew from the bowl instead of the stem unscrewing from the insert--if you follow me. Would someone knowledgeable with pipe repair please recommend the proper glue to use on the female insert to secure it in the mortise, or were these inserts not glued from the factory? I don't think wood glue will adhere to the metal insert, and I'm cautious of using an epoxy because of the chemicals involved that could potentially mix with the smoke. Any thoughts are greatly appreciated.