I mounted a Kifaru frame sheet in my S-25. (Kifaru changed the stays to carbon fiber arrows vs aluminum) In the first photo you can see the arrows out of the stay pockets. The arrows are very stiff with just one in each stay pocket. They aren't needed for my loads. I could have left them on but opted to cut off the metal tribars on the frame sheet. 2 slick clips mount it. The frame sheet doesn't interfere with the S25's o-rings. With the sheet mounted, it doesn't go all the way to the bottom of the pack which is good. Maybe 2" above. That allows the bottom to still mold to your lumbar area. I can run a Kifaru Chamber Pocket now.