Just back from a blown out non maintained track, but I got to test some setup after advice from Billy Easton (thanks Paul ) this car has so much weight in the front that when it transfers to the rear on acceleration the transfer is large instead of small compared to a conventional setup. So the rear will become loose when you soften up the rear like you would on a reg setup buggy. So making the back stiffer is the opposite way you would think to gain more rear traction but it works with this buggy.

Here is the setup that I came up with and its not done but it drove very nice on a loose blown out track. It has a lot of off power steering and is very stable on hard acceleration, on power steering in the corners is nice and easy to control as long as you dont punch it hard and maintain throttle control. Anyway its just what I came up with.
(BTW it is on a nitro sheet as I could not find an editable Be sheet.)

https://docs.google.com/open?id=0B2R...VmNjdkZGRiYmFm