Been testing some other racers out, obviously Stone is the best when you don't use enhancements, but since we use enhancements for WRs I thought Wild Ride's speed and maneuverability would be better than Stone, and it turns out that was correct. However, with enhancements Harris actually seems to be the fastest. Her weight, maneuverability, and speed with enhancements are the perfect balance for courses with choppy waves. I've gotten times 2-3 seconds lower than my best time, I'll just have to bust out my capture card at some point and record it.
It brings up an interesting question, what other racers might be better with the enhancements than previously thought on certain courses. I tested Harris out on Ice Crusher and she wasn't quicker, but maybe the other two ice courses might have some improvements, particularly Snow Blind?