This is the second grip now I've installed. With the first one the weight insert fell out, because of the butt end threads came apart. I got a bunch of rounds in before this became an issue. Now with the new exact same grip the threads broke off while installing the weight insert. I swear it wasn't cross threading or even over torquing it. The thing just fell apart. What am I doin wrong? When installing nothing weird happen. I use mineral spirts on the tape and it just slides right on. What gives?