One of the members mentioned his experience with Wavenet in Chicago a cool to hear. Even if there I'd no cabinets of these anymore (even though I bet there is), I know Boon has data for every version they did backed up somewhere.
I just hope he will release that to us someday soon or one of the rare boards surface
It's funny, he says the demo was basically Johnny Cage vs Johnny Cage but proto 4 wouldn't let you pick the same characters. Not that I doubt him or anything, just an interesting tidbit.