Seems everyone uses both the volt and ammeter, just nobody really makes the ammeter work for fear of such a large wire thats hot at all times running into the cockpit. You could delete the ammeter and get a clock instead or bolt on a blower and substitute a boost gauge.
As for the lighting, I drilled 1/8" holes into the side of the bezels and epoxied small led lights into the bezels. I havent actually finished wiring and trying them but this is what FFR recommends for lighting. The part # for the LED's is #7219 at Radio Shack and I think they come 2 to a package. Good Luck with them!
Mike