The best way I have found and it worked for me Is>>> Pick the arrow you wish to shoot, then Pick the gr tip. Pick the fletching you wish 4 or 5 in. Fletch the Arrow . But leave the tip insert a little losse so you can trim that end... Put up a paper tune rack or Put up some sort of holder thast youcan use to hald the sheets of Paper taunt. Start with the arrow ar full lenght. stand back from the pare about 12 yards and shoot.2 or 3 shots and look at the paper tear. If it is a Bullet hole Leave it It will fly tru. If its not a bullet hole . Shott 3 at a time and trim 1/4 in at a time till the arrow stops a wag and Puts a bullet hole in the paper. with My Ckeckmate I started with a 31 in arrow and end up ar 29 and 3/4. Like i said It worked for me .