I love it when someone figures out something that works. But figuring out why it works is the challenge. I've had a few discussions with Tony and while I might not agree with the acoustical relationship to accuracy, vibrational formulas do relate to one another. As it turns out, I think I'm seeing the relationship of his method to why it predicts the node position of the structural vibrations - that have been shown to be the root of improving accuracy. Barrel oscillation upon firing resemble structural vibrations of a free ended cantilever beam with one anti-node, 2 nodes and a "remainder". This remainder is very close in length to Tonys 1/9 length - which he converts to 1/8 length by adding the Noodle or Slider extension. On top of this, one can add as much weight as one wants to the node location, without changing the position of that node. So adding length out past the location of the tuner body only reinforces that the node form AT the tuner location. This extension also serves to increase the Moment of Inertia about the node point, thus further smoothing the muzzle motion, making the tuning setting much more stable.
So in my opinion, his method is a big step in the right direction.