rharv,

in the DAW I use, there are unlimited AUX sends - it just goes into the signal chain like an effect by itself as a send slider with an identification number, then you put a return on a new track where you place the effect chain you want to have returned. On the 'Master FX', you can just do the same kind of thing. You can put effects before or after the master volume/pan fader.

If your brain things in signal flow, it works well. If it doesn't then it can be confusing.

And BTW, my earlier post was not meant to be a slam against Mac.