I had a Gibson j-45 which I got in 1956. The bridge lifted, and, the top bellied behind the bridge to the point where the intonation sounded more like a really cheap K=Mart special. My local store, BUCKDANCERS CHOICE went to work on it, and, although they were not able to flatten the face to its' original position, they did get it down some. Then, they made a compensated bridge bone, and, it became a "Kick ass" guitar (according to Dave Mallett who now owns it) I liked the weight of that old ax, and, the bass it had, but, it died with a capo. It could not compare with the Taylor.