Hello all, I finished a Cuben pack today. The pack body is around 1800 cubic in without the collar. The collar adds around 800 or so cubic inches. I am not sure about the pocket capacity, due to the stretch of Lyrca mesh. But with that taken into account, I'd say this is around 50+ L capacity.
I decided to eliminate a front seam needed to attach the closure strap. I was able to do this by running a strip of Cuben sewn to ripstop down the front. This created a solid anchor to attach the closure webbing to, as well as eliminated an extra seam. I also went with a triangle for the closure (pic 4) to disperse some pressure.
The side compression cord is 2.5 mm glowcord. I like having a reflective matterial on packs.
The Cuben is 1.43oz from Joe at Z Packs (I highly recommend him, great service). Green Cuben body, white Cuben collar. The bottom is VX21. The front pocket cuben strip is combined with 1.1oz ripstop nylon. The pack weight, with all removable features (shock cord, side compression static cord, load lifters, sternum strap) is 13.15 oz.
Here are some pictures (any blue seen on top is just my sleeping bag):