I think this can be more effective for some types of filters than others. I use a royal violet filter which has a very round case with some angular pieces and scratches and doesn't hold up well. It scratches and would fare much better with rubber edges. It feels like something as odd as putting a rubber band around the pins would help stop the slack that keeps the thing loosening unless you push against the tension (something you can't do by doing it turn the socket wrench backwards - it causes it). The fact that the tension drops and gravity (holding the wrench aside in my case) loosens the pins and you try again to put the wrench back into the position where it should be inserted to tighten it immediately since You don't have 90 degrees of free play to tighten it again, because if you tighten it, you loosen it again. Each automatic closing will help you break the vicious circle :). different story.
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