My gun club is having a youth day in july.....during our normal 3-d shoot.... a hole bunch of kids events...and little prizes....free food for the kids.... so Bowman opens his big mouth and says " I can make up a bunch of arrow pens for prizes"......this would not be a problem.....if I could figure out which shafts and pen inserts fit together:doh: i have tried almost every combo of shafts and pens I think....I cant find 2 that will fit each other... does anyone know which pen insert will fit which shafts???:noidea: