I got a imperial 3" trackball from that creepy pinball/arcade store for $10.
Only a few light scratches on the ball, and smooth bearings.
The problem is, when I try to spin it fast, the ball "jumps" up off the bearings, making it stop.
Any idea how to fix this?
Oh, and I had the idea of putting the ball in a rock tumbler to smooth it out. Is this a good idea?
And, the ball is white, but has been yellowed partially. What will fix this? Rock tumbling?