Aaaarrrggghhhh!!!!
You have twin throttle levers on your Warthog and you're assigning prop pitch to......a....a......BUTTON????? HERESY, I SAY!!!!!!
Just kidding! LOL
Speaking for RAF fighters, I don't know what would be the better choice of buttons for prop pitch. The AXIS controls of the Warthog working with the AXIS controls in the Controls Menu give you such precise control of throttle and prop pitch, especially in combat, it's hard to imagine why anyone would willingly relinquish that.