Stump,
I don't intend to apply it to the whiskers, just on the extra 'nock point' I'm going to tie beside them. I think that's what your recommending. Their movement seems to always be towards the center of the bowstring, so I'm thinking one on each will do. The lower silencer seems to be more prone to moving, which may be a function of my 3-under release. You can barely slide the things at all, so they're not tied on loosely, but after a week or so of shooting the lower one will be at approx. the 1/3rd position while the top will still be near it's starting place 1/4. The bow's quiet, so maybe I should leave them where they "want" to be!