Well, well, well, it seems, like minds come up with the same idea.
I had been using double ring buckles on my compression straps for stuff sacks in my pack for a few months (replaced all of the plastic ladder lock side release buckles). For the stuff sacks I used split key rings and 3/4" nylon webbing. I've since replaced the key rings with stainless steel rings.
I suddenly thought why not use a double ring buckle on the hammock suspension. I had been using cam lock buckles on tie down straps from Harbor Freight. I hadn't been having any problems with those, but couldn't find the exact breaking strength for them which had started bothering me. Also, I started worrying about the abrasion from the teeth on the cam lock buckles.
I started searching the web for rings. At first I only searched for stainless steel rings and could only find jewelry stainless steel rings. I wanted load rated rings and didn't want to pay the premium for what someone considered jewelry. After a few days, maybe a week, I stumbled on the descending rings by SMC. Load rated and the rating was more than what I wanted for the hammock suspension and the ID was on the right order for the 1" polyester strap webbing. Searched and found the lowest price, $2.40/each, ordered 4, cut the cam lock buckles off the Harbor Freight straps, installed the rings and haven't used anything else since. After about a month, I think, I reported on Sgt Rocks web site.
Wait a few years and I'm sure that somebody else will again independently rediscover this system just like I did and start a new thread about this great hammock suspension system they have just discovered.
Good ideas just keep coming back - like the Energizer Bunny.