This actually doesn't achieve what I was looking for. I wanted the ability to be able to copy a current mix to my cue mix on the fly during a tracking session.
If I get a whole band tracking at once, I can get their levels and record a bit. Then mix everything in the control room to what sounds pleasing on speakers and in the cans, then apply that to their individual mixes, and then tailer their mixes from there. Much easier and faster to get an inspiring mix to the musician's ears than doing one channel at a time across say 16-20 channels for 4 different musicians.
I appreciate the link though, as I see this feature can be handy in a different scenario!