Modular adjustable fretboard apparatus

A removable fret assembly for a fretted stringed musical instrument comprising:

• a. an elongated rail having a first end and a second end as well as an upper surface and a lower surface;
• b. a first plurality of bores extending from the upper surface of the rail to the lower surface;
• c. at least one fret having a longitudinal body and a spine depending therefrom and movably disposed within at least one of the first plurality of bores on the upper surface of the rail;
• d. at least one mechanical adjustment device movably disposed within at least one of the first plurality of bores on the lower surface of the rail in contact with the spine of the at least one fret;
• e. at least one bore disposed in a side of the rail extending inward and in communication with at least one of the first plurality of bores;
• and
• f. a mechanical locking device movably disposed within the at least one bore on the side of the rail in releasable contact with the spine of the at least one fret;
• g. wherein movement of the mechanical adjustment device causes the at least one fret to move in distal relation to the rail.