dont waste your money on the sos for the trg, infact dont waste your money on the trg. get a cable slide like everyone else said. Some of the newer production exiles have a slot milled in it for an sts, mine didnt. My sos broke in about 300 shots. If the sts doesnt mount, I use a sims string stop and love it. Just a tad more bulk but very quiet.
"If Darwin saw the same sunrise and sunset, that I see from a duck marsh, or my tree stand; then he would know there is a God, and that He created all of it." -Ford-