Nut Testing for correct nut height is as easy as pulling out an average business card and sliding it under the strings by the nut. If the gap at the nut is allowing the card to slide freely, you may need your nut recut to the correct height. By having your nut at the correct height, you will be playing maximun music with minimum effort. Bridge A correctly fitted and adjusted bridge will bring more out of your instrument. Ten basic measurements are involved in making a great bridge.
String spacing between strings is uneven.
String arching too high, too low or uneven. Bridge too thick causing muting, too thin and warping or prone to break. Bridge thicknessing bumpy or uneven which blocks the smooth flow of vibrations. Feet of bridge not shaped to fit instrument. Two sets of bridge springs not correctly thicknessed or unevenly thicknessed.