I just bought my Guardian... used... and only got a chance to throw on a qad ultra ld dropaway and fire about 20 arrows. I noticed a lot of hand shock compared to my Allegiance. Again, the bow was used but in good shape. It does not have the string silencers for some reason. I threw on my mini sims stabilizer and could not tell a difference. Other than the hand vibration, the bow shoots great. I have just read all of these articles about zero hand shock and noise with the Guardian. Any ideas? Do the string silencers make up the difference in the vibration?