Got Lucille back from the dealer Saturday. [Thats my bike, not my girlfriend.] Cost me a little over 300 bucks, but it sounds great. Service manager said they pulled the chain and measured it, checked all sprockets and guides and tensioner, and all looked like new. [Triumph paid for that part.] I paid 2.8 hours labor and for a bunch of shims. [Service Manager was crying that it took his guy eight hours, not my problem.] Talked with the man at length about how the valves being tight could cause a noise. He said the Triumph people swear that when the valves are too tight on this engine it sets up a chatter in the camshaft. I'm still not convinced about that part, but the paint can rattle is definately gone. Will it stay gone? I don't know. For now, I'm gonna ride more and worry less!