Taking a 2x4 to a bicycle frame is not a good idea, in any circumstances.
I'm not doing that - and I'm not looking to bend it back and forth all over the place. If someone else ends up with this bike and wants to change it back, that's their decision; for me, this frame is going to wear modern running gear until one of us goes.
Is this a really bad idea - I see that two of you seem to be very against it. I have decided to take it to a shop where they have liability insurance, a frame jig, etc. Is this way bad? This is a nice lugged Reynolds 531 frame that I love, and do not want to ruin.