[susan53]

The forced break idea sounds great. I've been trying not to do more than two hours at a time, but looks like even that is far too much. And you do forget ... I'm sometimes surprised how quickly eight hours pass I'm getting quite good now at left handed mousing, and I even sometimes pick up a pen instead of typing things. Wonders what you can do with old fashioned technology ...

Thanks for all the suggestions. i'll try everything.