Okay, I understand that cutting the back end off an arrow is suppose to sttiffen the spine of the arrow. But how much would jump it an arrow size. Like if you cut 1/2" = one arrow size? We have never cut the back off an arrow before and have heard how some people do it all the time because they like the way it makes the arrow perform. It just makes me nervous buying arrows since they are so expensive and it seems I never quite get it right. Right now our ACE's are way to stiff and so I have some weaker x10's on the way. I can't afford another set of arrows so if these are too weak we will need to cut the back end to make them stiffer. Like I said, it makes me nervous cutting on $340 arrows.