The camera plate is supplied as standard with the camera shoulder strap system. The plate is arcaswiss compatible and can therefore be easily locked to the widespread tripod heads. In addition, the board know 6 thread 1/4 ", on which, for example, the safety belt of the FS-Pro can be screwed. The extra disk I bought, because a camera on the ground for normal use ("normal" lenses) is required, and one on the tripod collar of heavy mega-zoom EF28-300L IS USM. To complain that the friction between the camera base and camera plate to be desired. She twisted under load. I have therefore rectified with a thin rubber layer (inner tube). Star ratings: would actually unnecessary, because the area of application is bound to the FS-Pro harness. The board does what it can and should. Point deduction due to lack of friction.