Rega Planet - Transport Problems?

A friend of mine bought an original Rega Planet, and it sounds good in his system. Recently it developed a problem where upon dropping in the CD and putting down the cover, the CD spins with a wobble (or off center). The cover has a magnetic puck mechanism that is centered through a hole, and there is alot of play in the hole that holds the puck in place. When the CD starts to spin, you hear the off-center vibration, and you have to mess with the puck location alot until it spins smoothly.

Has anyone else had a similar problem with this? Can anyone tell me if the puck should have considerable play in the hole through the cover? Any ideas why this is happening? Thanks.