I just received this throwoff from Musician's Friend and installed it on a snare. I kept having issues with it not doing a good job of tightening, so I decided to take it off the drum. As I was doing so this small bolt type piece popped off. I was able to get it back in, but after moving the arm a couple times it just fell right off again. Musician's Friend just refunded me and told me to keep it. is this just a defective throw or am I missing something here?