Cool vid. I actually had thought of doing the same thing with the VS Hogans Alley cab I had before. But since it's only me mainly that enjoys the games, there was no point. So I kept that all in my centralized (temporary) Mame cab. Ended up trading the cab for a monitor, and well atleast the cab will now be with someone who will treat it right.
I may have missed it, but I am going to ask anyways, how are you adding credits when playing the VS games?