Originally Posted by Campag4life

Yup...that is an effective BB for mounting an external bearing crank to a BB30...but Wheel mfg spacers work very well also.
Either solution will work fine. Ultegra cranks tend to work very well with BB30. A primary reason is the design of the crank with one piece spindle which has adjustable preload...lateral adjustment of non drive arm on the spindle spline...whereas the majority of BB30 cranks have a fixed spindle length and rely on wave washers for axial preload which require a bit more effort to set up properly...and a major source of issues with BB30...people don't use not enough care in set up.