Thanks for posting your findings, Len. The main reason I wanted to try the STS out was that the Liberty is not a speed burner in the first place. I wanted to eliminate as much weight as possible from the string. I've only tested some 355 grain Beman ICS Hunters (.400) at 29.5"draw and 70lbs. There was a drastic reduction in vibration and hand shock. (I had already taken off the factory hush kit from the string). I need to test my hunting arrows which are 398 gr. ACC 3-60's. Probably will not be that big of a difference. I just wish I could get rid of that "thump" it makes when the string hits the suppressor. I've heard you can play around with the placement of the suppressor and get better performance. Right now I have it about 1/32" off the string. Guess I should try a few different postions to see if I can improve it a little.