It was the 2002 Nats held at Lilydale in Victoria.
I used the following setup from the AE website.
http://www.rc10.com/racerhub/setup/r...2_tristate.pdf
Lilydale was a big track and it had very good traction (like you would expect at a Nationals). I tried a few changes but the car worked very well like that so I left the setup.
If the car is all over the place then I would work on finding the best tyres first. Car setup is secondary. Find out what the fast guys are using on that track. If it is a large track (like most gas car tracks) then use fairly firm tyres or the car will ‘wonder’ down the straight. I used FAST 40 Fronts and Rears. If the car is loosing the rear end then try something like 37 Rears and 42 fronts, maybe also try 3.5 degrees rear toe in.