CLF Research and Music Man were treated as separate companies, headed by Fender and Walker, respectively. Fender made the guitars and basses, while Walker's company made the amplifiers and sold accessories. The instruments were made at CLF and shipped to Music Man's warehouse, where each instrument was inspected and tested. Problems with fibers in the finish caused Music Man's inspectors to reject a high percentage of the instruments, and return them to CLF for refinishing. Since Music Man didn't pay CLF Research until the instrument finishes were deemed acceptable, a rift developed between CLF and Music Man over payment.