Just lost one of these on my C2 and have ordered a fastener parts set for the grip module. Torque spec is 12 inch-lbs with Loctite 242. I'll call Staccato tomorrow, but wondering if the normal maintenance program calls for a remove, clean threads, and replace activity at some sort of interval. The C2 is my carry gun and hasn't seen very many rounds; OTOH there is very little thread engagement on the tiny 4/40 screws.