I understand your problem exactly and it doesn't take 15 years to aquire the problem. I would bet you that you keep the mouse in front of you just beyond or aside your keyboard. If I am correct, what you will find is that unconciously you put all of your upper body weight onto the hand with the mouse (I do the same thing). The best solution is to have the mouse in a position such that your arm rests natually beside you, like a same platform attached to the arm of your work chair. Unfortunately, that probably won't be possible. I believe the solution is one that does not require you to move your arm all over the place. Best suggestion is a tablet which you can place on your lap where hands naturally fall. The Intuos 2 from Wacom would be very good and it comes with a cordless and batteryless mouse and pen (pressure sensitive). The tablet has a cord so you need to make sure that you have space to move the cord around. Currently I have a cordless mouse which takes away the cord issue but my work area still requires that the mouse be well out in front of me and that causes my arm to ache. Maybe someday when I have time I will design a CAD workstation that is completely egonomic with a built in display (> 30") with high resolution. Anyway, best of luck in what ever you decide.
M. Lacroix
Mike LaCroix
