Four asteriks really isn't going to tell us what the problem is.

I've been shooting QADs for five years, and have never had a problem with mine. I've set up well over 100 of them on customer's bows as well (I did four today). And there again, with any of the pro-series lock down models.... just as long as they are set up they are pretty bullet proof. Had a guy this evening with an 80# XLR8 whose thumb was contacting the lever on drop. Shaved off a bit of rubber.... smoking X's at 342fps.