Sounds a bit like where we run at Full Throttle Raceway in Foley MN. My kids got a T4. He's got Bar Codes for it but he's had good success with Double Dees front and rear, Flip Outs, M4 Holeshots, and even Calibers if the track gets a bit dusty. Currently he is running AE blue springs in front and silvers in rear. 30 wt. oil with #2 pistons in front and 27.5 wt with #2 pistons in the rear. Zero degree rear hub carriers with the B block, camber link mounted in the second from inside hole. Inside rear camber link in the inside position with a single washer. Front 30 degree caster, inside camber link location is the inside position with a single washer. That's what I recall off the top of my head. Its a great handling truck.