You need two cars if racing and bashing. I like your tires, and that Tekin 250 servo is awesome once you figure it out. Get rid of the stock arm if it causes problems, I had issues with it. I have two cars for racing and bashing, a Losi 3.0 8E, and an XB8E 18 XRAY for racing. I put a truggy motor in the Losi and blew the motor off the mount. I had to modify it to take a larger, and I mean a much larger screw. That truggy motor does not play easily, looking at getting wheelie bars. I also installed the larger Badland tires and lowered the pinion to 14.