And the final thing I took apart tonight:
A simple stage-box with 6 XLR female connectors, one thick 10 meter cable ending in 6 XLR male connectors.
The idea here is to replace 4 of the XLR female connectors with combined XLR+6.3mm ones to make this more versatile and to add 2 1/4" swivel-heads to mount microphones or a camera directly onto the box.
(You get these heads for cheap as mountings for security cameras.)
The swivel-heads shall double as a helper to keep the cable organised when not in use.
...maybe I'll come up with something to put into the mostly empty box.
Lots of wasted space that can be put to good use.
Maybe store adapters in there or batteries.
(click on the photo to see more.)
Update: the finished modification