Yes I really like the BJ4 ! I installed the new belt & Idler pulley for the XXX-4 Losi came out with, it is much stronger & more pliable than the stock one.
I pushed it hard with no belt jumping, but that was with the Novak system. Also the belt is fully inclosed that should be a +

I really don't think I can get a large control to fit in the XXX-4, so I'm wide open for a great Buggy / Truck to convert to a powerfull BL & 3 cell LiPo. I really want it to fly !!
One thing I do want is 4wd, Maybe a G-Maxx ?

Terry