[Quetscher]

Hey Alan, thanks for explaining what I didn’t understand myself to full extent (and what a wise dentist – I wish I had one myself!)
Concerning the idea of placing the thumb beneath the melodica: this reminds me of some button accordionists who play with their thumb staying at the side of the keyboard to stabilize their hand.
I’m looking forward to your experiences with the technique of turning the wrist, for me it works really good.