I was wanting some help please. I have just gotten into 1/5th scale and my first 1/5th is a KM 30.5 baja. Are all the parts for HPI baja capatible to use with it? I want to upgrade some parts on it and the only parts is from hpi. The other is my rear hubs were really hot after running it for about 15 minutes or so on 4th round of break in. Hot enough to actually burn my hand with the wheel nut. The wheel hub was just as hot also. Is this normal for these big cars?