Yes, but not in the way you'd think!
The COMAND unit is still plumbed into the loop, hidden away where the NAV drive lives. Telling the unit there was no CD changer anymore wasn't enough, it still needed the main unit to be present.
I may revisit it at some point in the future but at the end of the day it does the job and it goes unnoticed unless you drop the boot panel to get at the fuses.