I do use that more classical approach of the thumb being in the middle of the neck the entire time, and i have to say that when i do fast runs on the upper frets (15+) all the way from the high E to the low E (and soon low B!
), the back of my hand does end up hitting the low horn, and i do think that this particular change in the prototype can really help me out with doing these things more cleanly and accuretly, and i also believe it will encourage the person playing it to use this "Proper" classical technique, like people say about how the scoop really helped them facilitate their right hand technique better, i believe this might do the same to the left hand.