With BB30 there are no cups - the bearings simply press into the frame - a couple of cir-clips inside the BB shell ensure they're positioned correctly.
With PF30, the bearings are held in a plastic housing that is pressed into the BB shell
Cool, it'll be me selling, just when they took the crank out of my cannondale and discovered it wouldn't fit in my cervelo, I have a bearing still in frame and one out, wasn't sure which was the go.
