"...it's still in the shop... but I want it. I NEED IT!"
The concertina seems so soothing. I bought a Hohner D1, but the notes are arranged so strange I can only play something by first carefully planning it out with a chart.
I think, for a perfect concertina, it would have to be more ergonomic. I would hold my hands out in front of me, and you measure and create something that would fit 'em. Standard concertina, I'm having bend my wrists backward almost. That's hard on my tendons. The two faces of the concertina need to be angled like this: / \
Also, every button should make the same note push or pull.
And, I want a full set of notes 12 to the octave, maybe 2 octaves.