These frame grabs are intended to demonstrate the problems of bump steer and positive camber (outside tyre with regard to the road) on roll on a standard RF (as delivered to me anyway). Admittedly they aren't the clearest shots but I think they show the problems to some degree.
The road is heavily cambered although it's not all that apparent in the pic's.
After this session it was apparent that more camber was needed - the tyre was only worn on the outside 1/3, in fact the "tread" was almost gone on the outside while the dags were still attached inside.
Bump steer was quite extreme, something like 18-20 mm (at tyre) across full bump to full droop. I don't think my GT-R has that range of movement in it's computer driven and designed-in rear steering. I don't know whether that was typical or just my car.
It turned out that the car also had a bent sway bar which made things a bit more difficult on the day.
Tim.