no no I didn’t say you can control multiple mix racks at the same time
I just mentioned you can control monitors from FOH and vice versa…
you can log out your surface from one mix rack and connect it to another one to control it…
and after you did your changes you can go back to the first one
but the simplest way would be to use Director for additional control.
a multiple mix rack solution would allow you to combine processing for a virtual desk with 256 mono input strips but still 64 buses
if you really need this, there are better solutions on the market…