I finished Making my G4 pack today from a kit from Quest. Came out well. I cut out foam pads for shoulder straps and waist straps. I also made a sit pad for a backsupport instead of sleep pad. I use a thermarest pro light air mattress. I bent a easton aluminum arrowshaft around a large coffee can. I heated the shaft with a tourch first. this anneals and takes the temper out of the alloy so it bends easier without kinking. I layed the shaft on two pieces of cheap foam sleep pad. traced the shape and cut a v shaped groove in bothpieces. I then aplied 3m spray contact adhesive to both pieces of foam and aluminum shaft. I glued matching foam pads together with arrow shaft horshoe sandwiched in between. This brought pack weight up to 18.5 ounces. The support is worth it. Fully loaded with my tent bag all cookware and etc base weight is 12 pounds 4 ounces. minus water food and clothes. she pics here if interested. http://s166.photobucket.com/albums/u109/valar5/G4%20Backpack/
Happy TRails to all