So from someone who has actually had some seat time on both, how different is the 13 doo from the 12 doo? How many degrees does the skid "twist" back and forth and how are they getting the "give" in the side bite of the track? Have not followed the recent changes to the doo until I saw a commercial on them during NASCAR this past Sunday. Also, if a guy was going to boost one (and I would want to), is there a kit out there that has proven itself yet? Like I said earlier, I'm a newbie when it comes to Doo these days. I rode a '12 Etec the other day for about 5 hours and was impressed with the engine but not a huge fan of the chasis. Got used to it, just not a fan. My biggest complaint was the lack of running board and how they seemed to load up easily. To the doo's defense, I am used to CR Tunnels which are some, if not the best running boards in the industry IMO!