I'm not sure what to think. Certainly with high end vintage guitars you generally don't mess with them. On the other hand you have things like Danelectro and Teisco that were not well thought of in their time, but now are sought after collectors items. Right now, I actually have more F/A's than anything else, and I am getting them very cheap, they are undervalued. I think good, undervalued guitars could be platforms for mods, paint, pup swaps, all sorts of stuff. So where is the line between fun and wisdom? Is it all just a crapshoot?