One other thing to check, if you have not already. I have found that with easton aluminum arrows, using easton inserts, I get about 10 or 11 out of 12 that the inserts are straight. ACC`s are a different matter. I don`t think I have ever gotten more than 3 out of a dozen that did not reqiure playing with the inserts to get broadheads to spin true. As I am sure you already know, there ain`t a bow tuner in the world that can tune an arrow with a crooked broadhead screwed in the front.

NRA,UBP,BASS Member
New Stanton,PA