When I switched to the CEFX body (right after Cleveland), I didn't like it right away. It felt too twitchy. But the more I used it, the more I like it. I had to change the setup in my car a little, but I am faster with the CEFX body. I do carry a Speed 8 body just in case, but I have not had to use it. I ran the CEFX at the January Jam Triple Crown race and got 3rd in the A. I know the body helped. I am going to be running it at Snowbirds as well, so we shall see how it handles at real high speeds.