However I do find it more difficult to play the melodeon and concertina standing up. Nowadays I compromise - I take a high stool to gigs so when necessary I can sit down to support the instrument on my knee but without losing much height. It's more like standing with a bit of support. However whenever I don't need to support the instrument I stand.

Hi Howard

We play standing up, but I've taken to carrying a folding stool for when I'm playing concertina. Left foot on the stool, concertina on the left thigh, job's a good 'un. I then put the stool behind me and stand up when I'm playing the woodwind: and in between dances I sit on it!