I think I met Gail Keel and she wasn't much interested in my buttonbox - but that's probably because the concertina is really not played in the same way.

Thanks, Gern, for the invite to the St. Pete bluegrass group. Maybe I will check that out some time. I have a banjo (long time since I played it) but I know pretty well what clawhammer sounds like. There's a similar rhythm that's easily played on the accordion - I had thought myself that it sounded a little old-timey before you even brought that up. It just might sound good although, aside from Cajun, I can't remember buttonbox played with string band. Maybe you have? Anyway, thanks for the interesting suggestion.