If you havn't tried them yet I'd seriously consider the extreme limbsavers. The bolt on using your limb bolts and should keep vibration from transfering from you limbs into the riser. I have virtualy the same thing(pse nv system) on my bow and the PSe primos comes standard with them. They'll probably run you close to $50.00 but I'm sure you'll find them well worth the money.

http://www.limbsaver.com/limbsaver/a.../xtremels.aspx

I've been really impressed with the product and think you'd be too.