I broke my cocking lever and the holes in the linkage were worn oval. The replacement linkage FX sent had the hole for the block too small, as above. FX said there were two versions (this was in December) and sent me another one. It fits and works, but while waiting I just drilled the hole larger in the first one they sent. It also fits and works fine, so drill away. I did it with a regular cordless drill, slowly, stating with a bit just barely larger than the existing hole, test fitting at each step until the pin just slid into place. No biggie.