I haven't seen what you're talking about but I just added a couple of Sims Vibration Recurve Limb Savers to the inside of my Excal limbs near the ends where they barely touch the string in the uncocked position.
May have slowed my speed down a littlebutdefinitely helped with the noise.
Saw "Uncled Ted" Nugent do this with a recurve and decided to give it a try.

xbowbarry