Ok here' s the list of hop up required
Ball cups with delring inserts for MTX 3
Steel 39t Bevel gears for front and rear diffs OR... Kawahara Centre conversion (I got the conversion its much better)
MTX-3 rear hubs and axles
V-1-RR rear camber links
If you have a powerfull engine get the K factory centre bulk head
Swap the self tapping screws that hold the top plate on at the front and rear for nuts and bolts (see earlier posts)
Everything else is eye candy!