Colin, the extra distance in threads would only increase the distance closer to the required 55mm. But I am sure everything was as tight as it gets, I am always worried that something will fall off and hit the ground :-)
Steve, at the top (12 o'clock) the stars are elongated but less than in corners.
I am guessing less distance from the center = less elongation than in the corners?
Thank you for your replies.
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