A local guy races 4 mugen said that mugen actualy did their home work on the truck and this is all you will need. He says it is just as bullet proof and wears just as well as the mbx-5 pro spec. If you recall the mbx-5 was updated because people were running the new parts form other companies on the buggy. The new truck is suposed to come w/ all the goodies that currently exist. If there are enough updates to the truck then I'm sure a new kit will become available, untill then this is the hot ticket. If you take a good look at it, those aren't ball cup braces like on the original buggy. Those towers are suposed to be machined, and the buggy is suposed to be hour long main race ready.