I have a Rigid EB4424 sander that I've had for years. I really like it and have used it often, but not abused. Anyway, I was using the belt and it jumped up and stopped. Had a deuce of a time getting the lock knob off, when I got the belt mechanism off I found the "fan" drive gear split in two. All my searching has come up empty - Rigid, E replacement, etc all say the same " NLA" Has anyone found a workaround for this $4 part that renders the sander useless ? Thanks for any help