Would much appreciate some help here, i don't really have much of a clue! - I have a stock slash and I'm gonna put the castle 2400 SC combo in it. Getting MIPs all around and upgraded bearing adapter. Not too sure what to do about the diff though. Do I upgrade to a Revo diff? can someone give me some part numbers for what i need please? Are there any other up-grades I will need? I want to get this right first time as I live in New Zealand and it takes ages to get things sent down here. Thanks a lot.