I have mine on the stiffest setting and it seemed just right. A little too much for perfect balance in all situations (high speed push) but in 2nd gear it does the trick
For reference, Evolution school instructor Andy Hohl was at this event doing driving instruction. In a fairly well prepped SS C5 Z06, he managed a dirty 38.2 to my clean 39.6. So my car and driver combo still needed to drop about half a second to be competitive with the Andy Hohls of the world yesterday. But at least it's not multiple seconds. I think I know where to find half a second in my driving yesterday (sausage making at its finest).
"The waiting is the hardest part" should be the autocross theme song...