I just picked up a SB Gretsch tom and one of the lugs won’t allow a tension rod to be screwed in more than a few turns (and well before it touches the hoop). I tried a different rod, so I have concluded it’s a stripped swivel nut receiver. Normally I would remove the lug casing to replace the insert but I’m thinking this must be a tom from the era of self tapping screws being used to attach the lug. Thus I am reluctant to take the lug off. Any suggestions?