When I first saw the brass blocks and all, my first thought was snake oil!! But after Ive seen the diff first hand, I add them on all my better floyd equipped guitars. The diff is definately noticable. I have also used the milled brass claw and like the feel of the raw vintage springs. Ive not yet seen where to get the coated springs. Something else Ive done on my top 3 guitars is the Ti insert blocks that hold the strings. I cant really tell a tonal benefit, but they dont break like the stockers do. I do have one question though. I know the diff in the big blocks is because of the mass and weight. Since Titanium is lighter, do Ti blocks make as much difference? I wouldnt think so, because of the weight. Im guessing they work simply due to the mass?