Quote Originally Posted by amtrosie View Post

If you inflate the double bladder, you will see that both internal bladders can not fully inflate. This is due to the restriction of the external material covering. One bladder or the other can fully inflate, but not both at the same time.
To my understanding this was the exact purpose of the system not to have twice the lift. It is redundant therefore your only going to need the secondary if the primary gets punctured or fails for some reason. If you need more lift either get a bigger wing or an entirely seperate wing and double the two of them up. Probably creates a lot more hassles but thats another story.

Matt