Hey guys new to the thread, I have a couple of questions about the regular 415. Does it come with a front oneway or diff, is there a center oneway. Is the car good on carpet with foams. What options such as springs etc. will i need for carpet racing with foams. I havent got the car yet is the reason for asking so many questions. Think Tamiya will be coming out with a replacement for the car in the next year or so?