Rick, FWIW, the guy that runs trad gang use to sell a wool product that you wrap the string with where it comes in contact with the limbs. I bought a pair 8 or 9 years ago and they are still going strong and they work remarkably well, though I guess you could use any wool thread.
I shoot an old original Silvertip, and I've had friends stand 10 yards in front of me with their eyes closed. they say you can't hear the shot at all.
