http://rc10b4.com/forum/showthread.p...hlight=academy
Page 303 has all of the mods for the buggy.
The stuff that should be done is the following.
ceramic diffs, b4 diff screws, the updated wheel hexes w/ threadlock because they are easy to get(the stock axles break), rough up the motor mount so it doesn't slip, dremel out the chasis so the arms can travel their full range, set of shocks you know well (Kyosho or Losi would be my go to), front one way, 68P spur gear. When this buggy was built up it was better then the V2. It is an absolute tank and drives great. This platform is very similar to the ZX5 so a base setup can be very similar. Only thing is that it a way tougher.
heres pictures of the good after market chasis as well.
http://www.rctech.net/forum/r-c-item...-4wheeler.html
This buggy was a pain to build up, but it is 2nd to none once built up.