With most carbons you can cut from the back end for tuning.Except tapered carbons like AD's,only cut them from the front end.I tune all my carbons by cutting from the front end because I like to tune mine with the arrow wraps on.I tune mine with saran wrap,I'll take alittle saran wrap and push it in with the insert.It will hold the insert snug enough for tuning.Its quick and easy to tune without gluing your inserts in first.You do need a softer target to shoot into like a bag target that doesn't grab too tight.I shoot through a shallow box about 2" thick.The box will hold the angle of the arrows position and the bag target doesn't grab too tight to pull the insert out on arrow removal.This is how I tune all my carbons,it has worked for years for me.