I've been using the thumb operated Logitech trackball, whatever the current release of it is when I buy one, since 2002 or so. I think I've gone through three o

I've been using the thumb operated Logitech trackball, whatever the current release of it is when I buy one, since 2002 or so. I think I've gone through three or four? My current one is the wireless one from 2014 or so, and I don't like it quite as much as the old ones, but it's better than having a mouse.