Gringo Loco, did you need to apply heat to the action tube to break it loose?
Not at all. There was no thread locker on it. I first tried just using hand pressure on the screwdriver - no dice. Then I gave it a light bump with that non-marring mallet you see in the pic. Still didn't break, so I gave it a sharper rap and it broke loose. If I were to apply a thread locker, I would go with something like blue instead of red, and only a little at the end of the thread engagement. When tightening it back up, I'll bump it with about the same force as I did to break as suggested by jwall. The modified screwdriver worked like a charm.
