I like to use arrow wraps and have them on when tuning so cutting from the nock end doesn't work for me.I use saran wrap for tuning all my carbons including HIT inserts.I'll push the insert in with a little saran wrap to hold the insert in.I shoot,pull it out,then trim and do it all over again.I have been tuning my carbons this way for about the last 4 years,it's quick and easy to tune without glueing in the inserts.You need a softer target like a bag target that doesn't grag too tight to pull the insert out.