Originally Posted by opentune
For example, would two different multi-ply birch shells rolling off the line have quite a bit of variability in fundamental tone for this same reason?
I guess that depends on what you consider "quite a bit", but essentially that's true. Again, practical.considerations are more important. You tune the head, not the shell so the variation isn't going to cause anyone to throw out a drum. The real point of my post is that marketing claims of dubious substance seem to gain a lot more traction than they should.