Definitely impressed with this buggy more and more as I get drive time on it. This past weekend was 2nd race with the XB4 and the car just flat out performs.
So far on our high bite clay I've been running 8-300-5 with HW 6.5 and HW 120A V2 ESC and geared at 21/81 with 15* timing. After quals and mains only coming off at 150* on the motor and 100* on the ESC. The car just feels planted every where.
I tried the 12* Exotek Casters in practice Friday and for the number of tight turns and 180s didn't like how they felt, almost like a little pushing going into the turns but felt good exiting the turns. I went back to the composite 9* ones and could hold a tighter line thru the turns with the 9* ones and still drive it hard.