DU Update: My Unit is Long and Heavy (2011/03/16)

We got Heavy Unit U.S.A. Version. It seems pretty rare, I've never seen it before. From the rom labels it seems to have some pretty big changes. Lots of them are labeled differently from current sets in MAME, not just 2 as you might expect. I don't know what all the differences are yet. I'll add a picture of the pcb later, it needs to be cleaned badly.