I just reread my original post and while all the info in there is true. I didn't like the way it reads cause it makes it look like I did all that research myself which is not the case. I am not particularly unhappy with the RNG myself, much of the research has been done by Zebedee, and it is at his urging that I am trying to find out which version. But what the hell, its probably worth a try and if it makes the game better for everyone. That’s cool. I was also hoping that maybe Agetian would read this and chime in if he knew anything from his research.
Meh, you're doing the hard work. I just found the right Japanese academic and had a poke on his website.