[BScout]

The MTRX Studio has two network ports that (in essence) work as a small switch. No need for another switch if you are just expanding by one Dante unit. Connect 1 port to your computer (which you have to anyway for DADman) and the second to the Dante converter expansion.

Run Dante Controller (downloadable from Audinate) software on your computer to patch ins to outs. The simplest configuration with only 1 expansion unit is all Dante Ins on DADman connected to all Dante Analog inputs from the Dante Expansion unit. And outputs going the other way. Do it once and then you know your DADman ins/outs are patched to the ins/outs of the Dante converter. If you use additional units, you would need a switch. But a single unit there's no need.

The Focusrite option is there -- there are others including Burl's modular system (B80). And there are Dante Mic Pres. Audinate has a list of dante options from companies.