Ran into my next roadblock in setting up the Aimtrak with MAME. I've got one button games working great complete with offscreen reload (have offscreen_reload set to 1 in mame.ini).
But for two button games, when I go into the MAME setup screen and press the second button for any control, it registers it as Gun 5 B0, which is the same as what I get when I press the trigger. I double-checked my Aimtrak Config utility, and AUX as well as any other buttons are set to Right Mouse rather than Left Mouse. But in MAME they always seem to register as the same thing? Is there a setting I'm missing or something? Any suggestions? This is happening to me for both of my guns.