Pivot bridge or plate for stringed musical instruments and related methods

A pivot plate assembly comprising:

• a. a pivot plate comprising;
• i. a tuning cylinder;
• b. a base comprising:
• i. a housing with a cavity for the tuning cylinder, said cavity including means for adjusting the position of the tuning cylinder within the cavity so that a string of a musical instrument is raised or lowered relative to the pivot plate when said means are operated;
• ii. an open tuning stop;
• iii. a raise stop;
• iv. a lower stop;
• and,
• c. a tremolo arm for pivoting the pivot plate around a pivot point so that the string is slacked or a tautened.