Both Larry and I have been playing with adding the catquiver mini to our pack systems. My wife got me a catquiver IV for Christmas, and the quiver part comes off. You may need to sew some ladderlock buckles onto the ruck to accomodate the catquiver, but it'll detach quickly. The Schuh packs have the same problem, and since it's a detachable system, it'll give you greater flexibility than just adding stuff to my cat IV. Larry's the one who came up with the idea, so he's "Da Man"!