Now I understand why people don't understand me when I say "You can't see the harmonica while you're playing it." In the future I'll say "The problem is proprioception." At which point they will say "Ahhh, now I understand!"
geeking out here.. first was wondering how they got the metal issue solved.. MRI is a really big strong magnet..clever that.
Then the actual mechanics of bending. I knew constriction was important, but not why, it is to make a very fixed volume resonating chamber immediately next to the harp...seems obvious now that I think about it.