Claude:
I have enjoyed reading these articles very much. Most of my career was targetted on the 'pleasability' and 'safety' aspects of vehicle dynamics. Your talking points show that the racing focus demands attention almost entirely to the balance and ultimate/max limit control regimes.
Great stuff ! (Check your e-mail).
I remember way back in time (1969) as a Summer Co-Op at GMPG, we had a car equipped with front and rear rocket engines mounted on the front and rear axle locations on the body (powered by hydrogen peroxide) that could 'augment' yaw moments by a rear seat operator that could surprise a driver or help them through a course.
I still have a few pieces of that system in the barn and the a pyrex bottle that held the peroxide that I smuggled out many years later.