There is an interesting similarity between these two necks. One has the oval "resonance" stone in the center, and the other has two "resonance" weights that are also oval shaped but on both sides of the center and a bit higher. One would assume that the underslung octave mechanism is used because the weights get in the way. I know that Cannonball has a patent on their stone on the neck. I wonder if this "new design" is a sneaky way around that to achieve the same effect.