I might do that, the ones you posted the other day look awesome. My TE is minty fresh, to be honest I'm a little nervous about trying to mod it. The GG I didn't care, if I screwed it up I can buy another for $20 or so, if I mess up a TE I'll probably never buy another one.
I ordered a 2.5 inch screen to try them out, that way the original screen cover with the NEC and Turboexpress can stay.
I could install one of those, the cool thing about the Turboexpress is that the stock screen can be popped back in at any time.
On the batteries, I bet the voltage drops like crazy when you try to power something up.
I just got 5 of the 3.5 inch LCD screens, and they all have a vertically rolling picture. The only systems I could get a stable picture with were my Neo•Geo and my at&t uverse cable box.
I wish I knew why they rolled like that