Will it have a register switch, or will both sets of reeds sound all the time? It would be nice to have have the option of a single-reed sound.
Any idea of the weight?
That's certainly an impressive range!
I think that I'd vote for a parallel layout too, though I've only had the opportunity to play a slant-layout Hayden so far.
I guess I can answer some questions.
It will NOT have switch, Bandoneons are not into this things.
It will be rather heavy, having Zinc reed plates.
The tuning is going to be MH (Medium High), which is typical for Bandoneons.
And it probably will not go anywhere, given Chinese made body/bellows, mechanics and the price into $5000.
I'd think repeating success of C/B system chromatic Hybrid Bandoneon at $1000 is a better way. Aluminum accordion type reed plates, machine made reeds, finished and set by Harry. I am not going to rush and spend $5000 on an instrument, half made in China, cheap looking, with black celluloid finish.
Don't get me wrong, I like my Jackie, and it's look is fine with me. Buy if I have to spend $500 on it, I'd pass.