Trigger Stick - 2 Button Games?

[NoOne=NBA=]

I'm getting ready to put together my trigger stick module, and am thinking about adding one button on each side of the stick connected to the trigger button.
The stick I'm using has 4 buttons on the top (1 Trigger, and 3 thumb buttons), so that will cover most of the games that used multiple buttons.
I wanted to include the side fire buttons for games that had them originally, and as an alternative to HAVING to use the trigger for games like Zaxxon and Gorf.

Can anyone think of any games that used a trigger stick in the arcade that also had more than one button on the CP?
I'm drawing a blank on this one, but would like to PLAN for two buttons, if I'm going to need them, rather than adding a second set later.