You might want to have a butchers on rccrawler.com - this one is shipping in limited quantities -
http://www.rccrawler.com/forum/showthread.php?t=107126
For you oOple crawling newbies, a DIG is a disengagement, where you disengage drive to an axle so the still driven pair of wheels pivot around the locked ones. It looks pretty impressive too!
*edit* Heh, didn't see you defined a DIG above terry..
