I am hearing very good things about those Ultras........I messed around with my Liberty and some of the Stealth Limbsavers, and I honestly couldn't hear or feel a bit of difference.
I finally left them on and slid the vibrablocks down even though I can't tell if they are helping........I was afraid to pull the Limbsavers off and mess up the finish. They were really stuck on there. So I guess they'll stay.
That bow definitely doesn't need em' but I had to play.
Time to leave well enough alone and just shoot the thing.