Is there a reason for the Dura Ace BB. Didn't the Mega Exo BB work for you? I have 3500mi on my SLK Mega Exo triple crank (on Roubaix Elite triple -05) and there is a ticking scratching noice reapperaing a second time now. The first time it was tightened by the bike store only 3 weeks ago. There have been several other posts with the BB being a problem. I am wondering if I should have it changed. The noice is really irritating.