After moving the battery to the front, the back was boring, and I needed a place to put my receiver box. This part, plus some rear inner fenders I found on Thingiverse (https://www.thingiverse.com/thing:2804455), really cleaned up the back half of the truck. I also added a license plate frame for 1/10 scale plates from RCPlateShop.com. I believe this will fit all 2.2 Wraiths, I've only tested the fit on my original 2.2 kit version.

Note: the rear fenders, license plate, and fuel cell receiver box are not included in my design.