Hey, People with Carpal Tunnel Syndrome/ Tendonitis/ DeQuervain / other types of RSI symptoms... what do you use for as a mouse? I bought this one: Bad CHOICE! my thumb and forearm started to hurt within 15 minutes of using it. It has a comfortable wrist position... but my pain stems from the fact that the trackball has to be used by thumb and this places a lot of stress on my thumb especially If I want to move the arrow or drag something accross the screen. And trying to control the arrow with a trackball is kinda hard especially if you want to bring it over a small part of the screen. I am gonna return this and try other ones.... so what do you guys use? My arm hurts after I use the regular mouse for awhile.