Man you get ugly quick! Too bad...
A smart man will listen and learn. BTW, adding blocks when scaling a car to compensate for the weight of a driver is an old method still used today, it doesn't matter what your scales cost, either!
You never answered the question, which is fine...but it does sound like you got sold a bunch of stuff!
Your $'s!
I am sure I have forgotten more than you proclaim to know about making a car handle.