Not trying to sound like a smart a$$ but the best thing you can do is sell the CK and start with an Axial or Losi crawler as your base to build off of.
The CK is just a name HPI gave it to sell more WK's. The cog is so high you'll have a hard time makeing it anything more than the basher it is.

But if you have your heart set on useing it, here ya go.

http://www.rccrawler.com/forum/forumdisplay.php?f=68