Back case of Uconsole

I am wondering if is there a way we can use a flat back design. If we use the same battery type as in Gameshell, just make it wider and flat so that the back case will be flat and the console will be looks stealth!

One reason I think Uconsole use a thicker bottom back is that its really easy to hold the console, maybe the edge can be customized into some shoulder buttons.

But if they make the whole console thicker, and keep the back flat, that will be more “retro” style. Larger interier space to hole even pi 4B or other board. I really hope people will make customized thicker back case in the future!