Bit late, but I owe you a response.
Quetscher, this is terrific! I like your approach, and also trying to generalize the problem (which Lowboy documented eventually very well).
Oh, and your playing is beautiful; I also explored the rest of your Soundcloud channel 🙂
It is also very interesting to hear the same instrument in different setups, experiencing such a variety of sounds.
I would be interested though to hear about the basic structure of the Vibrandoneon’s reed chambers, and the different sounds that it allows even without any further modifications.
And like the others here, I’m very much interested in your bending technique!