I used to have a real Baby Pac-man machine. Loved it but it has a special board in it that's sorta one of a kind (Vidiot! currently about $500 or so). It's complicated machine. I figured the board would fail in time so I ended up selling it.
Have not seen the baby-pac man on the 7800. That sound great. Is it still a WiP?
I never knew what I was getting into with Alien Pinball. The code in it is sort of crazy. Collisions were difficult and ball physics were hard (for me anyway). I put in gravity but overall it's just not right, just as close as I could get.