So I've "changed" (removed and reinstalled) the shaft in one of my drivers twice now and each time it has only lasted for 4 drives. I can't figure out what I might be doing wrong. Help please. Here's my steps:

1. remove old shaft (heat ferrule, remove. heat hosel, use club puller to remove).
2. clean clean clean. both parts are pristine when i am finished.
3. roughen shaft tip.
4. mix epoxy. mix mix mix.
5. add shafting beads.
6. mix mix mix.
7. apply epoxy to tip and slide on ferrule.
8. apply more epoxy to tip.
9. use flat head screw drive to put epoxy into hosel.
10. insert shaft.
11. bang butt end on floor while pushing down head.
12. move ferrule down.
13. clean off excess epoxy.
14. let club sit for 24 hours.
15. hit 4 balls and watch head fly 50 yards.

What might I be missing?
Thanks.