I made one of these packs two years ago using modifications to the pattern (smaller hood pocket, less accessory straps & hardware). The patterns are well laid out, as are the instructions. I used sil nylon for the pack, except for the 4 oz Cordura I used on the back and bottom. I used a light weight nylon mesh for two lower side pocket, with an elastic top. I placed a larger mesh pocket on the panel, with a bungee set-up over that. The hood is adjustable for overpacking, but it could be fixed, saving an ounce or two.
I also included a hydration sleeve, and a back panel stiffener that only added a few extra ounces.
This pack will easily carry up to 25 pounds with the frame stiffened. I found that rolling up a sleeping pad inside the packbag (in lieu of a frame) ate up too much room for for it to be practical.
This is my pack for most 3 day, three season trips, and it carries well.
Don't be afraid to increase the length of the bag, I added two inches so that the pack would ride properly between my hips and shoulders.