True story... when we first ran the car with the new aero, something didn't stack up, ride heights were not doing what they should at speed and the car was understeering badly at WTAC 2017. When we got home, I questioned the CFD numbers, thinking (as you do) it was someone elses mistake. Meanwhile I went over my own design work again, guess what, I had screwed up on my rear spring rate calculations and had not accounted for the wheel rate leverage values being squared. Basically we were running 30% too soft on rear springs and load transferring too much across the front in corners.Rear spring and damper change and we are sorted and the car now goes where I point it, with the rake angle change being spot on. I must remember to apologise to my aero guy one day for doubting the numbers