http://arakon.hn.org/supergun
one of the SGs I built. since TVs have RGB connection in germany, there was no need for the RGB converter.
it contains everything needed.. TV cable, PSU connector, 2 ports with neogeo pinout, coin and testmode button, power LED, in a hand-cut case with jamma connector at the bottom.
I use a modified saturn pad with it.
as you can see, it's not that much stuff really, just alot of soldering involved.