Abstract: This invention comprises a novel mechanical system for adjusting downward and side-to-side pressure of strings on the bridge of stringed musical instruments. The system comprises a threaded female element, to which an instrument's tailgut is attached, and a threaded mounting bolt which freely spins in a socket joint, which is incorporated into a mounting bracket secured to the instrument's end block, thereby allowing the tailgut's position at the point of the saddle to be adjusted higher, lower, or side-to-side relative to the instrument's table. These features allow the instrument's volume, resonance, and playing response to be adjusted in small increments, without detuning the instrument, to allow musicians to adapt quickly to different environmental playing conditions and musical repertoire.