Hi, I m from İstanbul, Turkey. I suffered thiş problem long years ago by using computer for my job. Trackball and others like mousepads etc. are useless for this problem. I thought this causes button/clicks make force. So I tried to soften Mouse and keybord buttons. And I did and worked successufully. I uses this kind of Mouse and keyboard olmost 10 years and carpal tunnel problems disappeared.. And also some friends tried and found very good. If you want to learn more you can write to me : ozden.basmaya@gmail.com