So, as part of my iterating on Elmo's excellent work on the AEKII USB board (see
https://geekhack.org/index.php?topic=113053.0), I've USB-ified one of my AEKIIs. But I wanted to keep the original look. So I ran USB signals over the existing ADB connector! This is the prototype cable, but I'm going to modify a vintage grey coiled ADB cable with a USB end as well.
It works really well, and was easy to wire to boot!