Well...leave it to that 1%....it actually won't fit unless you drill some new holes. The new battery box is shorter so the rear holes are an inch towards the center. I took 2 photos. First is the tray against the bottom of the Kraton with the front of the battery tray lined up and the second is the chassis of the Outcast vs the chassis of the Kraton showing you the new holes.
Hope that helps!