That's right. It is easier to adjust something with lower mass than the Lead-Acid Batteries!

Also putting the accelerator sensors down, produces less spastic movements of the motors. Inertia of the highest parts takes care of the rest.

It is a very impresive project and needs good close loop control design. Although I don't know if it worths it since the energy to accomplish that is way to high.

But, on the other hand, for the wow's that the designer is going to accept, may be it is worth it!

Ioannis