I may move from Dura Ace 7700 to either DA-9000 or Ultegra-6800 on a 2001 Trek 5200 OCLV 120 (USPS). Does anyone know (1) what kind of bottom bracket threading was used on these earlier OCLVs or (2) whether there could be compatibility issues? I'm nagged by a thought that the earlier OCLVs used unique threading, but this thought might be baseless (or relate to something about headsets on earlier OCLVs, not BBs). Thanks! - Stan