hey olddude, i been reading some of your old threads, hence the bump of this old thread.
have you tried a kneeling chair?
http://www.medicalinsider.com/images/kneelingchair.jpg
google "kneeling chair" and you will find many different designs.
they may look uncomfortable but are actually very comfortable and forces you to maintain good posture.
try sitting in one, you will be amazed at the comfort... as long as your knees are in reasonable health. perhaps ask your doctor
anyhow, they are great to take the pressure off your back and puts it on your knees... cheers!
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