And you can always carry your frame pump, too, for double extra back up. I don't even notice mine next to my water bottle cage, but it's there when I need it. Not sure what the advantage of getting rid of it is. I don't think there's much difference in weight or volume between two CO2 cartridges and the tool compared to a mini-pump. And the pump doesn't take up any space in your bag.
Attachment 19612
(pump has been straightened along the frame and secured better since this photo was taken)