hi mate,
i know this is an old thread but im just wondering how you turned your centre diff around on your hyper becasue wouldnt you have to make a new slot for the spur gear to fit through the chassis?
I can't say what he did, but I have my Jammin setup the same way and you can just put a few washers/spacers under the center diff and motor mounts to raise it up a bit. Usually it's only a few mm of clearance needed. For mine I think it's about 3mm raised up.