I am sure this has been discussed to death and then some, but how far back does the flat bit under the pickups go? Is the top flat under the bridge, or as far as the tailpiece? I worked on a 57 many years ago, and didn't pay that much attention to it details of the build and whatnot nor did I have time. It was only a quick repair. Now I wish I had. I didn't realize until joining this forum that my idea of the original top carve was waaaaay off.