Good news update. I got the back bow out by using a hair dryer hung on a banana holder about 8" away from the neck. I used an old closet rod for a straight support, and padded the ends to protect the nut and frets. I put about 1 1/2 "of folded up cardboard in the middle of the neck where the back bow was worst, and clamped it down as tight as I could get it. After about 15 minutes, I cranked the clamps down until both ends of the neck were on the rod, and let it stay under the dryer on high, for another 45 minutes. I then let it cool for 1 hour and checked the bow. It wasn't quite there, so I let it rest overnight, then put it back under the dryer for another hour, and jacked it up a bit more. After letting it rest still in position for another hour, I checked it, and found it to be almost straight. I put the neck back on and restrung it to tune, and let it sit on it's stand for 24 hours. I then checked the tuning, and re-tuned (All this was with the truss rod loosened, of course). I let it sit another 24, and checked the tuning and neck again. There is now a very slight relief.
I tightened the truss rod until it just took, then let it sit again. It seems to be holding a tuning now, and the relief is still there. Maybe not as much as I'd like, especially on the B string, but enough to make it reasonably playable.
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