Well I use the Trap Door Rest. I hunted with it last year for the first time and had a flawless season. It operates on the principle of inertia. Basically it uses no mechanisms that attach to the cable guard. I gave one to my brother 5shot but I haven't gotten his opinion yet. To tell you the truth I haven't talked to many people who have actually used it, but I really could find nothing wrong with it.

Life's short so hunt often