I have used B-spec now to finish those pesky Kart races (not Redbull yet), a few of the Nascar races, and some of the Super races. My experience is that Overtake command will get him to cut corners tighter, Accelerate does what it says (right off the track if you are not careful). I have used Accelerate to push opponents out of the way too. Slipstream was good for Nascar (get near the front, slipstream towards the end of the race, then Overtake/Accelerate). And as others have mentioned, the X-bow on the 'ring to get credit. Anyone else noticed audio issues since the 1.16 update? Mine has gotten distorted or cut out all together?