I understand from the macsales page (http://blog.macsales.com/39345-owc-makes-macbooks-pro-again-with-game-changing-product http://blog.macsales.com/39345-owc-m

I understand from the macsales page (http://blog.macsales.com/39345-owc-makes-macbooks-pro-again-with-game-changing-product http://blog.macsales.com/39345-owc-makes-macbooks-pro-again-...) that it has space for a couple 2.5" and M.2 drives. But that obviously doesn't take up all the volume. I don't know about a battery. But rectangular prisms are nice. Why does everything need to get shallow around the edges or the middle? So they can run some marketing-speak and say that their device is 1.7mm thick[0]? I'd hope for a large battery, but even empty space would be fine. An eGPU would be pretty neat, but hot, expensive, and complicated. I'd love one with an ordinary battery expansion and some I/O ports. [0] (May be thicker in locations other than the far corner where it tapers down to a sharp edge)