John, it is standard configuration, i.e. 6 rows, the diminished being the outer row, or the one with dust on. I would happily have mine surgically removed, as they add weight to an already spine de-forming colossus.

Daisy, I agree with John that it's commendable to make a different, richer sound than 'standard' accordion. I can't help yopu, as I've never knowingly pressed one, but that is because of ignorance rather than arrogance. I just swell with pride if I make a successful landing on a major 7th!

The demon of the basses, Sir Samuel Pirt, might give you a pointer, but I don't think I've even seen him venture into that zip code on his box.

Skipjack