For a long time struggling with my two-row I had a chronic pain that wandered all over my left side - shoulder, back, neck, side and front ribs, left arm. Now I've got a more natural grip with the left hand now, and I learned a few yoga exercises from friends (back-stretching), the pain has gone, and the instrument has become a good friend. But I cannot explain what has changed with the left-hand grip.

However, I rest the melodeon on one thigh crossed over the other (changing thighs from time to time) and I'm aware that this position is inherently unbalanced and twists the spine. Anyone have any comment on this?