Pay close attention to the angle of each string in relation to the tailpiece. The tailpiece should be adjusted so the strings never touch the rear edge of the Tune-o-matic. Contact here can cause tuning problems, so all the strings need to clear the bridge frame. You must have the genuine guitar spare parts to replace any like, wraparound bridge , custom guitar tailpiece , etc. When the tailpiece is adjusted, I finish filing the string slots. This involves carefully sloping down the back of the slots to allow each string to follow its natural angle as it emerges from the tailpiece to the point where it contacts the saddle. Adjusting intonation. The final step is to intonate the guitar by moving the new saddles forward or backward in the bridge to shorten or lengthen the vibrating portion of the string. The saddle-intonation adjustment screw is located at the rear of the bridge, and the idea is to move each saddle forward (by turning the screw counterclockwise) or backward...