I also think that it would be quite different if "multi-hammering" - that is, to play with more than one hammer in each hand, as per Xylophone techniques...

Depending on where the notes were arranged, it could be a nightmare to try and get a consistent spread with the hammers, unlike the fifth-tuned style, as well the previous comment about the diatonic/chromatic stuff.

That's why I prefer whistles to recorders, (I have both) it's almost imposible to play a wrong note on the whistle, long as you have the right key ...

Probably will suit certain styles of music better than the standard setup, but exactly what, I can't say. Referring to the English Concertina / Anglo instruments, certain styles of music fit on each better.

Mine is triple strung, with individual bridges. Until I got the positions exact, the damn thing wouldn't hold tune...

Wonder what the ratio between the two sides of the bridge is, the standard is 1:2 I think, this one would be ... 11:12?

Each style would be just as difficult to learn, I would think, but like playing left-handed guitar, you would not be able to pick up someone else's standard instrument, either to try it, of if you were going to borrow an instrument because yours was unavailable for any reason...

BTW, They did make Piano Accordions with a keyboard on each side, but soon discovered that the left hand was not as free to move as the right hand because of the necessity to control the bellows, so they didn't sell very many of them... :-) maybe in a hundred years this instrument may be VERY VALUABLE... :-)

Robin