i have brought a smartech pro too 2004 i have been buying all my replacement parts from thier site and a few from e-hobbies where they give you tougher durable parts that last longer then the factory parts smartech has been upgrading thier parts because i have order a few and they where better than the orginal here the link for smartech http://www.moltengold.com/cgi-bin/eBzget5A.pl... 0r smartechracing.com