Q-Release

"The Q-Release allows you to mount a shoulder pad underneath your camera for better camera system balance when using a DOF adapter or camera package lengths up to 36 inches. It allows you to move the center of gravity forward. It also has a handy quick release to mount and un-mount quickly.
Q-Release (to mount the shoulder pad under the baseplate it moves the center of balance forward, also shortens the camera length on DOF handheld packages)"