I'm planning to customize a joystick solely devoted to Ikaruga, and want to keep the buttons as close as possible to the original arcade. I'm not too knowledgeable about Japanese arcades, so....
I did find this picture:

Just wanted confirm that buttons are:
1st button (A) = Shoot
2nd button (B) = Polarity Switch
I'm guessing in the arcades, the homing missiles had to be activated by pushing both buttons at the same time, instead of a third button?
Actually, if anyone could link a picture of the original Ikaruga cab, that would be cool. Or were all Japanese arcade games in those generic cabs (http://en.wikipedia.org/wiki/List_of_Ja ... e_cabinets)?