I ordered the 5 series which is rated to 200 lbs. The error is on my end. Which is good since I tested them, found the failure, and corrected it, without losing a cool rocket, and know they will work for low and mid-power.
I asked him today to quote me on swivels and kevlar upgrade for the wildman journey 175 fiberglass rocket that normally has nylon. He has stronger ones in polish stainless too.
Ted has some really useful info on his site, i used his screw trick an it works like a charm ! I just received a couple harnesses an some shiny stainless parts today from him.