This beautiful 1946 Martin D-18 came to me with the neck already separated from the body. The neck had been professionally reshaped and refinished (except the headstock veneer) at least a dozen years earlier. The X brace was scalloped around this time too, a delicate procedure expertly executed on this instrument. The saddle was really far back making intonation very flat up the neck. I thought about replacing this original bridge to make the saddle location better and because this bridge top had been planed down. However, the bridge has never been off and the original footprint of the bridge was very clean. The thickness had been modified but not so much that the strength of the bridge area was compromised. I like to think of the bridge as a brace, just one that looks nice and is on the out side of the guitar. I filled the saddle slot and recut it as close to the front edge of the bridge as I dared. I reshaped the bridge top and added an unbleached through saddle. As a result the intonation has been greatly improved. I also reset the neck and refretted the guitar.