I have no idea how to adjust the thread, but I don't consider it a mortal sin if you leave it as is. After all the trouble to bring your drum back to life, I would play it if I were you. Those RK's have a fat woody sound that really cut through a large ensemble.
As a player, my approach to collecting is evenly balanced between securing a desirable sound quality and having an instrument of prominent or historic significance.
Hit Drum, Get Check!