In my Post 574, I mentioned that the two knobs on the face-plate of the FIP, if broken, are simply unrepairable, but Oz Flyer (David) in the Comment suggested two possible solutions to repair them. Here’s the first one I just tried since I don’t have a 3D printer as required in his second suggestion.
Stuffs needed are just some super glue and WD40, and I put everything on a piece of paper to avoid either the glue or the WD40 spilling over onto the table.
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