The best thing to do about those upper track guides is to both glue and SCREW them in. A while back in June of last year I did just that http://www.rcuniverse.com/forum/m_45...tm.htm#4521008 scroll down and look for a post by me, calvinwill.

The photos for Leopard teardown/rebuild no longer exits but I did pdf the web page and you can download it here:
http://www.mediafire.com/?5miwtedywgh

Will