Aputure Mini 20 Barndoors

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I have just come across a set of Aputure Light Storm Mini 20 lights which all work fine except for the barn doors which do not hold in place or have fallen off. My research on the Aputure site seems to say that they are not replaceable as the attachment is not removable.

Has anyone else with a set of LS Mini20’s had issue with the barn doors and if so been able to find a fix for it? Or a way of replacing them with something else.

Happy to answer any questions and open to all suggestions.

Appreciate your help.

Cheers.