Just let you know, Namco have released V2 of this game for CHIHIRO board.

Here is the main webpage (in Japanese): http://www.namco.co.jp/aa/am/vg/wanganmaxi2/about/index.php

And here is a picture of the cabinet:

http://www.barcade.com/media/images/1884_WanganMidnight2Cabinet.jpg

Ciao!