Wow, timing. I just got my fabrics&accessories for my next MYOG projects. AND, yesterday I ordered the SMD Aluminium Hoop. Without reading this thread. Stay should arrive next week.
I played with the thought of bending my own hoop out of aluminium tubes but did the math and figured the 25€ are way cheaper than hunting down rods and bending tools, count in the time spent too and it's an easy choise. (Probably need to count twice the amount of rods too as the first one wouldn't succeed). Thats the negative, realistic, approach. Although, I miss out on the experience.
To the previous experience. To bend a hollow tube you'll need a inner part too, for example a spring, to prevent the rod from buckling.
Can comment on the hoop when I get it.
Question. How have others solved the placement of the stays. I'm planning on using tubular webbing for it. Would obviously want to get as much transfer to the hipbelt as possible. So, normally the frame is inside the pack. But how about placing it on the outside. That would allow the frame to be attached directly to the hipbelt. Ah, right, like ula ohm ! (Just came in mind..) Wouldn't that be the Right way to do it?!
Let's have some wild crowd sourcing here guys!