In my attempt to lighten my pack while having money for other (admittedly Kifaru) toys I am not opposed to going with the composite stays. A while back the HPG forum had some tips to swap out the aluminum stays with lighter aluminum stays, for a much lower price point, at 8 ounces savings, which is nearly what the composite offers. I am planning on trying this, but I have to say, when I am standing my pack up in front of me and shooting off of the frame between the stays the rigidity really helps, so I may end up with Kifaru composite stays, anyway. But for about 15 bucks, it is worth a try.
pat