I must be totally different to everyone else then! Tried it on my T4-15 on low to med grip carpet and couldn't really get on with it till I mounted the ball stud above the arm and added 4mm shims inboard. Set the static toe to 1 degree and with this set up it gives between 3 to 3.5 degrees max toe under compression and the car was better and I felt I could push it more.
This running 13.5 blinky.
However I have put the Alu chassis on the car and may go back to the std set up without the ARS