>>6706725Also the backpack. It's kind of surprising how little actually goes into it despite its size, pretty much just the engine, taillights and front windshield (and front hood, if you count it). If they wanted it to be smaller they probably could have. In general he's really not kibbly at all, almost every part of the car that isn't in the backpack is used in robot mode.
It doesn't really affect ballance at all either. He can lean back a healthy distance before toppling over.