I cut off the 2 screwholes inside his roof/backback (special thanks to Matt Booker for the info) so the wheels fit inside the backpack which pulls the figure together. it also helps to raise the robot head up a little. I also slit his neck and wedged a piece of plastic under it to raise the head up even more. i also made a small cut in his arms to lower the sumo arm stance. I swapped out his Head and sunroof with a Henkei Ironhide.