Thanks for the info, but my Freewell ND filters (I have the complete kit) for Mavic 4 Pro don't have anything metallic behind,Could you show me all your box (front & back like me,Yours are very different), thank you?
First up those are not screws. They are spring balls, the balls are captured with a spring behind them.They are often used as detents which is what they are in this case. If you look at the metal tabs on the filter you can see a spot that is...