My random orbital sander has gone a little wacko. After I clamped it in my vice to do some small pieces it hasn't been the same. It wants to run too fast and spins too much. I see some sparks but nothing real excessive. It does get hot now.
I took it apart and the brushes (or is it bushings, the little black square things pushed up against the shaft) are curved to the shape of the shaft and appear ok.
Any suggestions appreciated.