Having just had engine rebuilt on Sapphire I fitted a group N clutch, the engine is totally standard. It ran fine for about 2 days then the centre bearing started squeeking very loudly, I removed the box and fitted another bearing which cured the problem for about a week, now it's doing the same, I've been hearing that the bearings supplied with the clutch aren't up to the job for the new group N clutch... any advice? Should I ditch the group N and fit a standard clutch? Thanks