Description Preston MDR 2 & 3 mount plates. These plates are needed to interface the MDR to the Steadicam mount and as a stand along to use with the Quick Release “Popper”. The MDR 2 plate can be mounted on the top or bottom of the MDR box. The MDR- 3 Mounts (revised) form the side of the box. The MDR-3 bracket now since revised can mount from top or bottom. The square receiver is no longer included with the 3 Bracket. It can mount directly to the Betz Iris rod mount. Can still be clocked for cable direction. If you want your motor/power cables to locate to a certain place just clock it 90 degrees. When used with the Quick lease, just a push of a button and it is removed. No Tools! New Pic’s coming of the revised MDR-3 bracket.