There are several places to purchase the X2-CR conversion, another at
www.nitrohouse.com. The Buggy was very simple to convert and two forums on this site provided valuable information on bulding and setup, to include Jammin website setup page. (forums Jammin X2 Buggy and Jammin X2-CR??) I am very satisfied with the conversion kit and saved $$$ to bring the X1 to X2 standards.
JB