I have found the Micro case a perfect fit for my PhaseOne backs. I have added some closed cell foam on both sides (parts from a sleeping pad) to center the back in the case. I have also added a piece on top for a little extra cushion. This little package fits perfectly in my Lightware MF2012 in the vertical position. Adds that little extra protection. With the different colors available, I can easily tell which back I have in my case.