I'm a bit confused...
WHY do you want a central station???
if you're using a desk for final summing (as you indeed seem to be) and then monitoring from there, why would you need one?
In the case of a system that is designed to be used without summing externally, and therefore monitoring directly form the I/O, the central station is fantastic but is NOT a mixer..... so you can't realistically do what you seem to want to do.
generally, with no desk, and multi I/O interfaces, one would return the Outboard into the DAW, or at least mix it into the DAW output using the relevant interface monitoring application and some of your Inputs.
Then send the master stereo out to the Central Station.
IF on the other hand your outboard is for use asa "mastering" chain, then you would run parrallel outputs from the Lynx, for Direct and outboard signal paths, and connect them to the Central Station as Input pairs 1 and 2, and thus be able to switch between monitoring directly and monitoring Via your mastering chain. and connect the master recorder to the record outputs of the Central station.
Does this help ??
Don't get the hump when i tell you it's going to be expensive, it's not my fault , you picked the site/building/room Ã¢