@jjg I don't know what your setup is like, but I was having problems with my right shoulder early in my career. I realized that the keyboards I used often have a number pad on that side, which caused me to hold my arm out. So I switched my mouse to the left, which allows me to keep my arm at a more neutral position. I haven't had a problem since.
Regardless, I hope the trackball helps! It's good to stay on top of these things. Good luck!
@cstanhope I hear that!
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