My research on this is that it only comes into play with a view camera. I finaly got a Hartible 45 T/S Super Rotator. Waited for about 5 weeks and it just came yesterday. I tried it out about five minutes after unpacking it on my Mamiya 645 AFD w/loaner P30. Other than screwing up the focus, I was pleased with the overall image. I'll try for another one and see about posting it.
This is a cut and paste from Phase One site re the P30:
Technical & large format camera support
Note: Wide angle and large format tilt and swing positions may produce a colorcast in the image
4" x 5": Arca Swiss, Cambo 4x5, Rollei Xact, Linhof M679/4x5, Toyo, Sinar, Plaubel, Horseman
This is the only mention of the P30 having a problem with T/S
Don