Gravity Strings has been repairing, modifying, and building custom guitars since 1978. Founded by Jimmy Gravity and Milan, the St. Louis shop handles 1,800–2,000 instruments a year and has done signature work for Pete Townshend, Tom Petty, Eddie Van Halen, and Bachman Turner Overdrive, among others. Every staff member is an active musician, and most have been with Jimmy for over a decade.