I play the Hayden Duet concertina (a beautiful Beaumont from the Button Box) and have worked out a number of Irish tunes for it. It’s quite different than the Anglo for this type of music, but I prefer it. You "comp" yourself. Many, perhaps most, recordings of Irish concertina music on Anglos has accompaniment although it is not usually prominent or intrusive. With the Duet, you provide your own accompaniment! Some of these Irish tunes are really great. The Hayden has given me access to them. Be all this as it may, keep up the good work at thesession.org!