If you haven't tried adding Limb Savers in addition to your Vibrablocks you should. I took my Vibra blocks and slid them down near the riser then added a set of the new LS Ultras up where they are recommended to be and WOW! This bow is unbelievably quiet. I've had several comments on how quiet it is, not to mention it is absolutely dead in your hand at the shot. Even shooting indoors at 312 fps with an arrow that is only about 25 grains over IBO, it is still quieter than most other bows shooting in there. My factory string silencers are almost gone as well. I'll probably put on Leeches when they are gone.