Zacuto Q-Release to mount a shoulder pad underneath the camera - Z-QR (ZQR) . The Q-Release mounts a Zacuto Shoulder Pad underneath your camera for setups like our Recoil or EVF Filmmaker. It allows you to move the center of gravity forward by placing the camera directly on your shoulder, making your kit shorter and lighter. The Q-Release ‘snaps’ onto a pair of 15mm lightweight spaced rods and tightens with quick release ratcheting levers on either side of the mount. It accepts 15mm male threaded rod ends to hold the shoulder pad or other accessory. 
Don’t forget to add Rod Caps to the end of the rods running through your shoulder pad so it doesn't slide off the rods!