For all heads that employ the RC2 (3157N) system, the replacement quick-release plate is the Manfrotto 200PL Quick Release Plate with 1/4"-20 Screw and 3/8" Bushing Adapter. The plate is compatible with 35mm and standard thread-mounted medium format cameras, and it comes with a 1/4"-20 camera screw and a 3/8"...