I know you are just playing devil's advocate, but i guess ill just play... an angel
Ok, saying he is freelance might explain a lot of stuff that isnt for performace, but jsut for fun, like flywheels with a rubber outer ring (mr^2.....) and putting work into making a humanoid face, even if that means mounting a radiator in an inconvenient place requiring tubing that has to flex and such. But the freelance thing as a whole destroys all plausability. Look at what Sony, a world giant in electronics can do with whole teams of engineers and massive funds can do, little, 23 inch, Qiro. There is no way that this man, no matter how good BMW engineers are

could possibly solve the myriad of gigantic problems (i'd say the walking, and the jogging that he mentions, is the biggest).