I would like to ask a question............what is the best kind of a chair to use, for sitting at the machine? I have tried several and not happy with any of them yet. Firs, I had a computer type desk chair (with arms)...not comfortalbe for sewing; then I tried an office waiting room type chair (4 legs, no rocking) and that was kinda ok, but the seat "sags" after a while..........now I have an old, rolling, with arms, chair (goodwill find) and that isnt very comfortable either. So what works best? I have thought of getting a thick piece of foam and making a "pillow seat" to put in it.......what do you use?