people say that the longer chassis makes it more stable and land better and basically there are no ill effects from the standard chassis (maybe less steering but there's still plenty)

just get some better ball cups especially for the rear camber links (losi or rpm)

thats really about all you need for the buggy, it's a winner out of the box. i did eventually switch to the aluminum bulkhead in the front because i hated the tiny screws that like to strip the plastic bulkhead on the front brace.

get the lipo ballast weight and a bunch of weights