I've never heard of the rice bag but will be more than happy to try it. My back is killing me today since I have been doing windows and such and I sewed the panels of a Xmas tree skirt today and by then my back had had it. I can't seem to sit up straight at the machine and I tell myself to sit up but I'm always leaning forward again. Bad posture. Thanks for the suggestions I'm going to try both and see if it helps sure can't hurt. take care and thanks. Sue