Soliarch, I use glue-on heads with either 75 or 100 grain steel broadhead adapters. Here is what I do-
1. clean the inside of the ferrule. Check the inside of the ferrule for build up of paint/teflon or whatever. I use a fine grit sandpaper if necessary (it isn't in most cases) and a q-tip with alcohol.
2. Heat the adapter and apply hot melt, apply a slight amount of heat to the ferrule, reheat the glue on the adapter.
3. Firmly seat the broadhead with a twisting motion
4. Spin check the broadhead.
5. Cool the broadhead in water.
If the shaft wobbles on the initial spin test, while still hot, twist the broadhead an additonal 1/4 turn and spin test again. I use a low temp hot melt to mount my brass inserts in my carbon shafts, so I epoxied an insert into an aluminum shaft and use it to mount my broadheads on my adapters and do the spin test. That way I don't have to worry about my brass adapters coming loose. Several years ago,I bought a half dozen well known, "big name" broadheads and I could not get them to mount up straight. I finally called the manufacturer and he said to send them back. He sent me back 12 new heads with a hand written apology. Good luck! Mike