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Message: <blockquote data-quote="Vollmeise" data-source="post: 3664770" data-attributes="member: 143821">Moin!Placing the base mount by forcing down the threadened eyepiece ring only doesn’t seem to be the best solution, as my experience with the aluminum collar shows. No matter how much you tighten the cover ring (by your finger‘s force), the collar can be turned by accident anyway.If the base ring was mounted more like your very first sight clamp (with a back screw to close the clamp), one can mount it directly around the accessory thread, without the cover ring. The plastic clamp won‘t damage the thread and should be more save against rotation by accident. The anchoring points are cool for repeatable alignment, I‘d keep that idea.</blockquote>