I agree with you Mike, I would hope they wouldn't leave that much space at the bottom and top of the phone.. And although having an aluminum backing is a nice touch, it is unlikely apple would go back to using it, as it is more expensive than plastic.
well you have to put the circuitry somewhere, so that's "possible". Now I don;t see why those guys waste time to do this... I mean... what's the point beside they show they can use a CAD software?