I want the PI system to be tweaked. My 599 has a PI of 699. The stock Veyron has a PI of 700, but I can't think of any circumstances under which my 599 would come close to the Veyron, as the Veyron is just too quick in a straight line. I also have a massively upgraded Mazda Superlight MX-5 with a PI of about 675 which is worthless in a straight line but fine in the corners, and a massively upgraded Audi Quattro with a PI of about 675 which is incredible in a straight line but which would struggle to turn round in an empty car park. Neither is, in practical terms, at all comparable to the 599 or the Veyron. Something is not really working here, and I'm not just talking about my insane car upgrade attempts.