yep, that is how i do it too
hold down the left and right triggers on the top
then while holding them press both the start & back button at the same time.
it may take a few tried to get right and may not work 100% of the time as you have to get the start and back at the exact same time.
But it will work 95% of the time
yeah inside your evox .ini file there is a part as you scroll down called [IGR] (which is in-game-reset) thats change things around to your liking and save, just dont do somthing stupid like set IGR as the A button only.