I'll throw my two cents in here, having just taken mine apart after a mystery noise. It's worth the drill. I set of gaskets are way cheaper than ruining or breaking something expensive. I've been wondering about ring gap as was mentioned above. You haven't mentioned that. I will say that mine seemed very tight during assembly. But then again it was pretty run out before the rebuild so I never had a feel for what was normal. I asked that very question on here. I do wonder though if you might not have the proper end play and clearance on that damper...
