I often wonder how many variations on the basic accordion design have been produced. There is certainly no other instrument extant with variations as numerous. And I don't mean bigger or smaller, but rather, CBA, PA, DBA, The "Flutter Box" demonstrated, the "Fake Piano CBA" and on and on. A drum is pretty much always a drum....same with a guitar....but accordions?....I wonder if Helmi knows. I've gotta go there! Look out Tom!