Your point is a strawman. We don't need direct measured values to show if a fundamental is accurate or not, this has been explained already, and ignored by you. Measured data for what should happen has been provided and ignored by you already. You have been given an opportunity to counter this and you have refused repeatedly to do so, falling back on an invalid strawman instead. The force on the steering should reduce at the onset of understeer, this has been shown via numerous sources to be true, GTS instead provides a rattle/shake instead, no direct measured values are going to change that clear difference. As such either GTS is wrong, or every textbook on racecard and vehicle dynamics is wrong. I know which side my money would be on. However as you quite clearly disagree with the likes of Milliken and Milliken, the onus is on you to prove them wrong in this regard. Perhaps we will see that in your next post rather that the repeated strawman we seem to only get!