I use one of those weird little kneely chairs that has no back, but has a place for your butt and a place for your knees. Given the opportunity, I will slouch, and this is the only chair that put my back in the right position. It was only a little weird to get used to, and now I don't think about it. (I think the pressure point is actually on the lower leg slightly below the kneecap -- I'm thinking of this because I fell hard about a month ago [on a handicap ramp, of all things -- years ago I hurt myself at a spa, and now I fell on a handicap ramp] right on my kneecap, and the kneely chair doesn't hurt it.) It has wheels so I can scoot back from the torch in a hurry if I need to. I got it at an office supply store -- Office Depot, I think.
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