but that kinda defeats the object of having BB30 which was a selling point of the frame..
I'm not sure I understand the logic of ordering a BB30 frame to use specifically with a PT crankset, but on with some ideas:
From the sound of this you have a BB shell that is not a nice clean even 42mm diameter all the way through. It narrows down, is that correct? Perhaps there is a lip as the bearing stop instead of a machined groove.
If that's the case then you would also have a problem fitting a sleeve to convert to BSA.
If the frame will take pressed-in bearings then the Campy OT crankset with spacers would work. Or forget the Campy crankset and use SRAM or another true BB30 crank.
If you already have the cups and crank, I suppose you could try the heretical idea of grinding them down, just the absolute minimum, and then using a loctite pressfit assembly compound.
The worst that would happen is that they work loose and you have to go back to the BB30 crank resolution.
To illustrate here is a picture of the Campy cups. The "O" ring you see normally fits into the groove that a BB30 shell is supposed to have where the clip goes. So presumably it helps a little to retain the cup in the frame. If grinding the cups to fit your frame I'm guessing it would have to be back to where the "O" ring starts. So, I definitely think an appropriate loctite compound would be in order.
There's sometimes a buggy.
How many drivers does a buggy have?
So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.http://www.youtube.com/watch?v=GekiIMh4ZkM