Abstract: An apparatus and method of fine tuning an electric guitar having a plurality of guitar strings, a tremolo system including a bridge plate assembly having a pivotal connection to the guitar body and connected to each of said guitar strings, a tremolo arm connected to said bridge assembly for movement thereof about said pivotal connection, a bridge lever arm or sustain block on said bridge assembly extending into a cavity on the bottom face of said guitar and counterbalance springs connected to said guitar body in said cavity and connected to said lever arm of the bridge assembly and a tremolo control and stabilizer connected at one end to said guitar body and at the other end to said bridge plate assembly lever arm, said stabilizer including a composite spring means under compression and an adjustable nut for varying the compression of the composite spring.

Abstract: A tuner device for a string instrument such as a guitar including a conventional tuning machine such as one incorporating a worm gear drive for initially tuning a string by controllably rotating the output shaft which has mounted thereon a peg on which a string is wound. The tuning machine is mounted on a support plate assembly which is selectively arcuately rockable through a small angle from its rest position to its operative or detuned position.