The tuning is used by students of Guitar Craft, of which there have been three thousand. Guitar-Craft alumni who continue to practice NST are called "crafty guitarists" or "crafties". Some crafty guitarists formed The League of Crafty Guitarists (LCG), which toured with Robert Fripp and released several albums. The Guitar-Craft experience and the League of Crafty Guitarists trained guitarists who went on to form new bands, such as the California Guitar Trio and Trey Gunn; the California Guitar Trio and Gunn toured with Fripp as The Robert Fripp String Quintet. Other alumni of the League of Crafty Guitarists include members of Los Gauchos Alemanes, such as U.S. guitarist Steve Ball; Ball is associated with the Seattle Guitar Circle, along with LCG alumnus Curt Golden.