I have a 1966 Fender Coronado which is actully a nice guitar. However to get the action to work I had to shim it. As I have looked closely at the guitar I can see that the neck has bent slightly at the point it attaches to the body. I assume what happened was someone left the guitar under tension with way too much relief in the neck. As the neck bowed it actually bent at the point the neck attches to the body. When I tightened the truss rod, which was completely slack when I got the guitar, the neck straightened except for this last bend. Having the bend of course tilts the neck up requiring the shim. The end result has been a guitar which plays very well except down on the body. The frets here completely choke the strings. Does anyone have any advice on how this is fixed?