I would love to switch back to a trackball. However, “trackball” is a name applied to two different and non-interchangeable products: Thumb-Balls and Finger-Balls. All anyone makes right now are Thumb-Balls, which are physically painful for many, including me, to use. I need a new Finger-Ball (ala the MS Trackball…

I would love to switch back to a trackball. However, “trackball” is a name applied to two different and…