MYOG stuff is excellent, generally. Does it cost less? No. By the time all materials are purchased, and, any losses in prototyping, you are usually spending the same or more dollars.
The simple satisfaction is a big bonus.
The knowledge you acquire along the way means a lot. Often not limited to a single project.
And, if done correctly, as Daryl (and his other) shows, results are often MORE than what you could buy. Or less in this case:)
Exploring the limits of What You Need/What Works/What is just “manufacturing” shortcuts is a challenge to any lightweight philosophy, as he shows quite nicely.
Well done! Daryl has posted here before, and his pack has been around for several years. I would request you write it up along with any construction details, Daryl. I, for one, would be interested in seeing this. I generally use a sleeping pad as a frame, but that is only one way. A great pack, sir!