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            S.O.S improves the intonation at each fret. Easy installation to your instruments. Designed and based on MTS theory (Pat.Pending) to fit major and standard musical instruments simply.
 MTS is a new method to offset the string pitch for fretted instruments. MTS derives the accurate offset value from instrument's string height, scale and stress of each string.
 
 Installation: Set S.O.S. between strings and fingerboard side by nut. (no glue)
 
 SOS-AG1 is for the acoustic guitars with 643-650mm string scale. Bronze strings are recommended.
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