FWIW, my experience is that vibration damping is a issue that can either be combined with a tuner, or dealt with as a separate issue, but it is important. Back when Jim Borden made stocks, his design was different than others that were are are still available, and he was confident that it was better damped. I have a friend who has experience with "fiberglass" stocks from all of the current manufacturers that also had one of Jim's, and although it was a little heavier, he said that it was his opinion, that it shot a little better. I give that more as background, since they are no no longer being made. Jump forward to the balsa, redwood, or cedar and carbon fiber stocks of today, and within that discussion their having better vibration damping will usually be mentioned. For those of us that are not in the market for such an expensive option, I am of the opinion that there are other alternatives that can be explored. One of these being the Sims Deresonator, which I believe does not see more use because of three major reasons. Top shooters have gone to stocks that do not see as much advantage from additional damping (the if Tony isn't usin gone factor). Deresonators are butt ugly. (This has more influence than most would admit.) and they are cheap, which is enough to convince some that they cannot be worth much functionally. In any case, whether it is incorporated in a tuner, or dealt with separately as a separate issue, I believe that the effect of improving vibration damping is significant, and would point to the whole discussion about the effects of bags being too hard, which I believe to be directly related as some degree of proof of its importance.