The other cool thing about AI is that having dual AI computers, I could actually monitor 4 tanks. Two on left wrist Perdix and two on right wrist Perdix. Two on left would be my primary tanks in SM. Then you could have a stage bottle on the right computer and maybe your deco bottle. When you leave your deco bottle it will just blank out the reading and then when you drop your stage it will also blank out the reading. Not saying that is for everyone, but it is possible and not far fetched.
Just put a pressure gauge on the stage bottles. Keep the AI to your bottom gas/primary tanks.