I just got a Fever Neo Queen and I have a Fever the King and Top Gun on the way. However, the Fever Queen is driving me crazy! The 4 rollers that guide balls to the start guide make a terrible grinding noise during the attraction mode. Is that normal? Should the rollers make any sound as they revolve? I tried taking the make apart to get to the roller motor without success. How do I service this problem? Thanks to all.

P.S., the Fever the King is coming from Arby. I know it won't have this problem.