Guest further up was me. Sorry. I'd forgotten my cookie needed resetting and I've not got round to it on my iPad.

Dick
I was referring to GD boxes which are prevalent this side of the Irish sea and I maintain what I said was correct. I play with a GD box player regularly.

I think you meant BC boxes which are effectively chromatic on the right hand and yes the left hand is an issue, though I believe many players have them modified to match the keys they regularly play in. As far as I've seen, Irish box players rarely use the basses anyway - just occasionaly for emphasis. As I said, for dancing, the rhythm is more important than having harmonically "correct" basses.