[tyreman]

With regard to the XXXcr I rarely change the setup on mine from track to track. The biggest change I made all of last weekend was to go from Blue front springs to black. I found the key to running the car consistantly was to add between 30-50 grams of weight to the chassis (never go past the servo keep all weight in the main chassis area)
When i go club racing and try different things on the car I always seem to end up back to my original setup.