Thanks for the reply, Paul. I guess I can live with the noise but new springs don't last 10 minutes before they snap so I was thinking the bearings were trying to tell me they're the problem.
I've gone through belts and tension springs and at least one spindle is making noise even though it doesn't have any wobble. So, I guess it's time to consider replacing bearings. Is there a good Youtube video or thread someone can recommend?