Am I correct that the angle of the string coming off the back of the bridge is referred to as the string break angle. The strings are not supposed to touch the back edge of the bridge after passing through the saddles? Is that also correct. I see some people like to lower their stop tail all the way down to the guitar body. How could you possibly do that without strings touching the back edge of the bridge? Could someone clear these issues up for me? Thanks
Couple of things. First, it's important to have your saddles in good shape. If the grooves in the saddles are deep, the string will hit the back of the bridge with earlier no matter what angle you have so keep fresh saddles on your rig. Second, you want your break angle as high as possible without touching the bridge, slide a piece of paper between the string and the back of the bridge.
Second, intonation will effect where your string touches the back of the bridge so if your saddles are moved closer to the neck to correct a flat intonation you will have to adjust your bridge height to accommodate.
Finally, Sustain will be alittle better if you crank your tailpiece studs all the way down to the body but....it may cause the strings to touch the back of the bridge, in that case, you can try top wrapping your strings. It allows you to drop the studs all the way down to the body of the guitar and still miss the back of the bridge. If you aren't familiar with top wrapping, just run a search, there are a million threads on this subject.