JR's MultiBox was developed to help match multiple servos when used to operate single control surfaces on large- scale model aeroplanes. Multiple servos not only provide redundancy, enabling the pilot to retain control in the rare event that a servo should fail in flight, but they can also be ganged up to provide extra torque. This is common practice, especially with very large jets and IMAC style scale aerobatic machines, where it is common to use between two and four servos on each control surface.