You only need to face if the BB is not a sealed cartridge type
Not true, the only time you need to face a b/b shell is when installing the "new type" (Hollowtech II) external bearing cups. If they don't sit square to the frame, then the bearings will wear excessively.
Not true, the only time you need to face a b/b shell is when installing the "new type" (Hollowtech II) external bearing cups. If they don't sit square to the frame, then the bearings will wear excessively.