Interesting observations. I have never had the Uni to Uni fail swinging up to 2.5 pound crappie into the boat, used same setup since 2017 for thousands of crappie including a lot of tournament fishing. Also landed quite a few big bass, catfish, Asian Carp, and drum on the same setup without any knot failure. It normally breaks just below the Uni to Uni if you get hung up in something really solid. But never had any case whatsoever of a separation. I dabble in surf fishing a little but always use a Carolina rig with a swivel, never tried a Uni to Uni in that application.
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