Hey, I just received my first Valk in the mail today, the Anni YF-19 as well as the Fastpacks. Even after reading all the posts on the forums about the problems with fastpacks and the answers to getting them to stay, I still had trouble finding the solution at first. I finally got it figured out with the following results. Unfortunately, there seems to be an abundance of dust in my room, and it really shows in the photos. The shoulder pads also are a bit high in the pictures as they had moved up while I was fiddling with getting the Fastpacks on, but they do sit flush when I have it done correctly.