ok this is more of a novel thing but what would be the best way to do this? Could one simply use a 555 timer to pulse the triggers to 100%? http://www.instructables.com/id/Xbox-360-Rapid-Fire-Modification/ next thing is drilling holes for tact switches is fugly, I'm thinking a button switch like this> at the base of the trigger, so you pull the trigger all the way in and it clicks this button.
the normal click system in the black buttons switches the triggering too rapid or normal speed. This should work the same, as you keeping the button pushed in for the switch too activate rapid. The only thing i see differently is that the normal black button has 3 contacts, for the: - normal version, - and rapid version, - and ground off course. thinking out loud here..