RE: carbon arrows, epoxy removal
Are you using the HIT hidden inserts, or the regular ones where there is a little metal of the insert showing at the end of the arrow? If it is the latter, find someone who has a precision machine lathe and have them make a light face cut across the front of each insert. This will square up each head as it shoulders up against the insert. I have seen this solve serveral issues such as yours without risking trying to remove the insert.