OK cheers guys, I’m really relieved that it’s not massively different as when i had a BJ4 i found out that the entire chassis was different on the world’s version!
I think ill be getting the new slipper as I don't think that I want to be disassembling the whole thing during free time between races! Anyway, the motor seems to fit into the slot in the chassis so that's not a problem either.
Also, I was wondering how the drive-train should feel under-hand as it seems a tad sticky as if there’s too much oil in the diffs or something (although they are quite smooth)?
thanks again