I always use hot-melt glue. It allows me to reheat and turn or remove inserts. If I have a tip that doesn't spin perfectly, I can check to see if it's the insert and change it, if it is. On occassion I need to trim a set of arrows because of a spine issue and it's much easier to trim from the tip than from a fletched rear.

If you do this, be careful. You can overheat carbon easily. Don't use a torch. I always use a heat gun and hold it as far away as possible and have it still work. I heat for a few seconds while pulling on the insert. I make sure that the insert comes out with the least amount of heat as possible. I've never had a problem with carbons while doing this. However, many have overheated carbons and caused serious problems, so beware.