I use one with a hook end through the bow eye and ring end down to a hook on the winch post. it has never loosened in over 12 years of use. I do tie down the painter as well to eliminate a single point of failure risk.
I've just got a galvinised turnbuckle to put on the front of mine fix a bolt through the ring to the winch post and use the hook on the bow ring belevie it works well
(Not Another) Nutkin
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