Not a mod but a fix, did a quick search & didn't see any photos of this. Got these years ago for a good deal because of loose/intermittent connection in one of the cups. While expanding the C retainer to perform the fix it snapped (of course
where the plastic side pin is.
Used a miter saw with a fine blade to carefully(!) trim a slice off a 2" PVC coupler (using gloves, glasses, holding PVC w/vice-grip etc.), filed the piece & used old black screws from screw jar to attach.
Works great, perhaps even stronger than original hardware. Had planned to paint the piece black someday but kinda like the ghetto look & its easier to ID the left earcup now
Pretty obvious fix but again didn't find any other photos of it around. All safety caveats apply, do @ your own risk, having all 10 fingers is nice, etc.