This thread illustrates how precise the tolerances in a BB30 system need to be and how difficult it seems to be for manufacturers to achieve them. So much so that Cannondale has given up it's flagship standard on it's highest end frame and gone with PF30 instead. Looks like an admission of failure on their part.
I not sure you understand what the issue is here. There is no problem with tolerances in the BB30 or PF30 designs (respectfully, I suggest you have a look at the definition of "tolerance"). The issue we are discussing here is using a crankset which Cannondale does not use in it's production bikes, which uses external bearings as opposed to bearings housed within the BB shell.
The problem is Campagnolo makes a set of PF30 adapter cups that are of poor design. Nothing more or less.
Like I said earlier, on my EVO, the SRAM PF30 adapter is working well and despite my initial reservations (I'm a professional aircraft engineer) about my EVO frame having no metal insert for the BB, it seems to work well.
Also, for those interested in this thread, it's worth checking the MTB forums for their BB30 issues.
From what I've seen, the only worthwhile external bearing adapter is the Praxis one, but at the moment they don't make a Campag one so I am making my own. Will post pics in a few weeks.