Very nice review PaHiker. I enjoyed it, especially since I've been dabbling with the idea of building one myself, also from free material (old feed bags in my case). I've actually very slowly been working on it over the past two years or so. I've got all or most of the pieces cut out in my office, but I don't have any of the hardware yet. I'm wondering if a different design would actually serve my needs better, especially since my gear is a bit heavier than most of the people who use these bags. After reading your review, I'm pretty sure that is indeed the case.
I've got a question for people on here who have more experience with packs. Does it seem to you like the sagging/weight on the shoulders issue could be due to too much length between the hip belt and shoulder straps? That's the thought that crossed my mind, but I don't know.
Edited by packlite (12/04/15 11:06 AM)
Edit Reason: edited to make images appear