Oh no, I've just thought of a way to make a far more accurate light gun sampler for the 7800 using the Mega7800.

And it could also convert a Sega Light Phaser to work with the 7800 directly as well.
Crap, like I haven't got enough to do!

@TheRetroHQ I use one of these for the 7800. The aiming seems pretty far off.