I really like this Kensington Orbit trackball (you know, with the clear blue ball), but had to set it aside years ago because the little black rubber traction rollers on the encoder shafts have degraded to the point that it's about unusable.
Two, tiny, little (butyl?) rubber bits.. and out of action.
So is there any saving it? Can I get new rollers or complete encoder shafts? It's the exact same mechanism as a mechanical mouse, turned upside-down..