I agree that for me the back ache problem sewing away from home at quilt shops, guild workshops, or retreats was the chair. I solved it buy bringing my own rolling adjustable task chair with no arms with me whenever I sew away from home. It fits perfectly in the back seat of my van, seat of chair to seat of van with rolling legs in the air. I would like to take credit for this great idea but alas, a dear quilty friend brought her chair to one of our retreats and a light bulb simply went off in my head. One of those "Now why didn't I think of that" moments. Now quite a few of us bring our own chairs.