ORIGINAL: killadoe
When iused to shoot alum. arrows, if one wouldnt spin I would heat up the insert (hot glue) and adjust it a little bit till I got them tuned the best I could. But with carbons I have a couple that wont spin for anything.
Thats one of the few reason why I don't shoot them things. I don't know anything about tuning a carbon so I can't really help you there, sorry for not being a better help.