I tried various tools inserted in the threaded hole at the bottom of the shaft but nothing of the size that would fit could handle the force required to move the shaft into alignment - all of them bent, including pin punches, hex keys and hardened screws. All before the shaft was anywhere near where it needed to be. I believe I will make a threaded insert to fit the shaft that I can screw completely into the shaft with a shoulder that bear tightly against the shaft. It will have a larger diameter portion that I can push against with the modified screwdriver - close enough to the shaft that it should not bend. As far as drilling a hole in the wood goes, it is so thin there it really is not providing any strength to the stock and the hole will not affect anything and will not be seen when the gun is reassembled.
Thanks again for all your help!
