There's been a lot of talk about tweak on this thread! I thought I'd post what I do to setup the car, this method seems to work well.
1. Balance the chassis, the SD has too much weight on the batt side when using GP 3300s.
2. Set the steering EPA by measuring the throw (Hudy board)
3. Loosen all of the droop screws, let the suspension have a lot of down travel.
4. Set the car on a flat, level surface, fully loaded w/ tires, and set ride height all around.
5. Tighten each droop until the spring perch just barely touches the spring.
6. Test the droop by using a wrench to lift the chassis up in the middle, from the bottom. If one side (tire) lifts first just slightly, the tweak issue is minor and can be fixed with a small droop screw adjustment. If one tire lifts up way before the other, than the chassis is tweaked or the car is unbalanced.
7. To fix a tweaked chassis, remove the tires and set the chassis flat on the table. Loosen the top deck, then tighten it, with the chassis flat. Now, when you test the tweak again, it should be better, closer to neutral.
Hope this helps out. When the SD is neutrally setup the only tweak issue I've had is after a major collision. Recently I've rolled the car off the track (corner dots
) but after the marshal put the car back, I didn't notice any tweak in the handling at all!!!