Just finished my latest pack. It is about 25L, it has a removable lid, removable framesheet (with two aluminum stays) and removable hipbelt. This should make it a good pack for even my lighter loads when stripped down. Here are some initial pictures of it. I am writing a guide on how to go about making the pack now. It is my second guide, and I dove in deep on this one. There are just so many small steps to making a pack like this, so hopefully I'll do well on that.
The black material is VX07 and the white is silnylon. The combination makes for a heavier pack, but hopefully a durable one.
With all the parts, it weights in at about 23.5oz. Stripped of the stays, hipbelt and lid, it comes in around 12oz, if I remember correctly.
The pictures are of it loaded with my synthetic quilt as well as 8L of fluids, putting about 20lbs in the pack. I'm really happy with how well the frame works. You can actually see how the torso remains long enough to keep the weight off my shoulders. I like it so much, I am thinking about redoing the whole project in a 35L or 40L size to hold gear for the whole year or a possible thru hike in the future.