The front C and A block also narrows the front track width a bit. I found the set up very helpful with mid corner and on power steering.

As for the springs. After running this car and EVO3 before it for 7-8 month, I am going full circle back to the stock set up with yellow all around and yellow swaybars. I find this give me the most speed around the corners. I tried stiffer springs but I had to slow down too much for the corners as they do not allow the car to roll enough in turns thus increase the turning radius.