Quote Originally Posted by Sam DeathWalker View Post
You can use a trackball for over 8 hours with no rsi.

You move less mass and use fewer muscels with a tackball vs. a mouse, its just kinda obvious. Why move your arm when you can just move the tips of your fingers?
I used a trackball for years. Now I'm finding as I get older if your trackball isn't perfect ergo for your hand you create extreme strain leading to carpeltunnel and other problems.