Well, that's food for thought. See the way I approach things now is, the next fish might be the catch of a life time, or the year, or the session, whatever, if there's even the remote chance of it not performing or failing then I want out! I tried a tail over a hook swivel, it seems on the face of it ok. But i can't help but think if you're unlucky when your fish is in a snag or weeds and manages to get lead hooked up long enough to head in the opposite direction to your mainline then conceivably it could slide off?