So I just recently heard about �flex testing� carbon arrows. All the manufactures recommend doing it. I started doing it to all my arrows a few weeks ago. Well yesterday I was testing my arrows before I shot. I heard a small cracking sound on one of them, I turned it and flexed it again��POW it snapped!! I am defiantly a believer. I will never shoot again without testing my arrows. Just another great thing I learned on this site.