How do you store yours? I have one mini, an AC3 and 3 flex units. I love them but finding a good storage solution has been a challenge. I'd like something as compact as possible, but it needs to give some protection. Right now I just have them in one of the compartments of my ThinkTank Airport Security 2.0 bag and move them to other TT bags, as needed. Would like to find something to put them in that I can swap between bags and keep them protected.