... that is, "Pete's third thread regarding Yamaha Ad Copy." So, I found out that Yamaha had started their own blog. That's the good. The bad is that I found a lot of stuff that I'd call "questionable." This is one of those things and I hope that one of y'all can provide more info. Here's the quote: This quote was taken from this blog post regarding the 82Z. In my opinion, this is Yamaha's marketing answer to Cannonball's mysterious, patented "resonance stones" in the Stone Series of instruments. I don't think there's any info that can back up Yamaha's (or Cannonball's) claim ... or is there? I've mentioned that I've read some articles that the flute tone (yes, I know: different instrument, but bear with me) is affected by the instrument's overall weight and wall thickness. That's all well and good, but at the very least you're talking about changing the material of the flute's headjoint or entire horn's body. Not less than 1% of the horn, which would be about the percentage area that the thumbrest/straphook takes up on a sax. I'd love to see a study anywhere on this. Personally, I've had a sax that the left hand thumbrest broke off of a sax and I replaced it with a mother-of-pearl button (as in, "A button that was found on a 1970's era shirt"). I don't remember any tonal change. I also used rubber padding on my Bb clarinets for the right hand thumbrest. I also don't remember any tonal change for those horns, either. Now, I know that there are a lot of sax players out there that do have aftermarket right-hand thumbrests and some of you have aftermarket straphooks, too. Have you noticed any difference in your horns? Anyone have any scientific proof that says that changing these things makes any tonal difference?