Well as the title says I am a first time 4Tec owner I found one used in absolute perfect condition it wasn't my intention to buy it but I couldn't pass up the deal for the quality.. well it came stock with the brushed motor and esc.. well I decided to go brushless and picked up a sick system tekin rs sec with the hotwire and a team Orion vst pro 8.5t..the power has destroyed the differentials and have noticed the 3.3 diffs are the way to go. Does anyone know the part #s for the parts I need.. I haven't decided if I wAnt to rally convert consider where I live on road cars are kind of useless.. next and final question what is the largest wheel hex size I can go with? Thank u in advance