AS a former AMX owner, couldn't resist looking at your post. Don't know much about Crossfires....although I love the one I bought a few months ago. I had about 300 passes with my AMX and my Spirit. Best DOT tires I found for launching were from www.daymotorsports.com. They were really sticky. Best of luck with your machine. I'm trying to figure why my 2007 Roadster is starting out in 2nd.