The Narwhal vs the Humpback?

We're using lithium iron phosphate batteries, which I don't have the same kind of thermal runaway problems that your kind of traditional electric car batteries have. So it's okay to be external. That big module has to go in the vehicle somewhere or on the back of the vehicle. And then we have to put the power down. So we always drive the rear wheels of thevehicle. The Narwhal and the humpback is different in that we drive the wheels directly from the outside.