See how Octanktaneor's butt flap doesn't lay flat in plane mode? It's really minor, but it points up at a noticeable angle. It's because his hips were installed on the wrong sides at the factory. You can see it in the photo I took from Seibertron.com... To fix: Pop his legs off at the hip ball joints. Remove the thighs. You're left with tiny square hip sockets. Put those hip sockets back on the opposite of the side they came from. Now pop the rest of his legs back on. No screws or anything. Now the butt flap lays flat in plane mode. See the attached "Photoshopped" Hasbro marketing photo for how that bit should lay flat.