This rebaissance thing looks good. But I think it would be less precise to
make movements with the arm. After all the idea behind a normal mouse was
to rest the arm and the wrist on the desk, hold the mouse between the
thumb and little finger and move it with fingers. Now since I work on a
dual head monitor, I have a lot of X movement than Y movement, and exactly
that has been the bad thing for the wrist, all that in an unnatural palm
down position.
Has anyone had experience with a real joy stick in CAD??
I've never used a real joystick for CAD, but the Renaissance Mouse is easy to
use precisely. You use arm movements for large scale moves and fingers/wrists
for small shifts. I find that I have BETTER control with it than with a
regular mouse, especially in that X direction you care about. With a mouse,
moving in the X direction requires a lateral wrist bend. With your wrist
rotated 90 degrees, though, you are using a more natural flex/extend movement
that doesn't cause as much harm.