Portable PC Engine - LT?

[Soop]

Wow, I never thought I'd be on here.

I've always wanted a PC Engine LT, and I think it would actually be quite easy and cheap to make one. I've seen some RGB mods for the white PCE, and while I have no idea how the screens themselves work, I'd imagine it wouldn't be too much of a stretch to integrate a Gamecube 5" screen and power it via the PCE too. Of course it would look as ugly as sin without a lick of paint, and I'd imagine you'd need a fairly hefty battery to make it truly portable, but that's fine.

Has anybody ever done this, or thought of it? and do those gamecube screens accept RGB, or are they just composite?