so my dad said the engine is here. so now all ive got to do is wait untill christmas not long now. anyway this is the setup its got on it...LRP z18s Pro, hpi engine mounts and screws, hpi race clutch shoes, k-factory race clutch bell. 40mm hpi fly-wheel. the bearings, washers ect. now all i have got to do is get them hardend diffs. i was thinking about getting the 2 speed but i think i will leave it for now. when i get the diffs what diff oil shall i use. it comes in different watts.