I've got one on my Trek Domane with a Praxis internal T47 BB. There was some frame contact so I put a very thin spacer in and it's been fine. What don't like so much is that the bearing is more exposed than I'd like.
I have just bought the p515 version but another user on Reddit reported a need for a spacer on the drive side for that version also. Maybe a 1 mm spacer. But where did you put the spacer. This is the non-drive side in the picture so I do not understand. I will assume that adding a spacer on the drive side will get the crank-arm closer to the frame than the normal 3 mm.