This is a (first-draft) model of an external holder for one end of a Doepfer A-180-9 Multicore Pair. I have one end in my eurorack case, and this out on my desk for semi-modular stuff that's just a bit too far to reach.

There is a cavity underneath to run the network cables, as well as two top holes to additionally route cables if possible (mine ended up not fitting, so I looped one end of the cable underneath to make it site nice).