Audio routing for outboard gear using Focusrite Scarlett 4i4

Hello! Has anyone tried using outboard gear (compressor, stereo reverb, etc) for mixing recorded tracks in Cubasis? I’m thinking of getting a Focusrite 4i4 and use the extra line outputs (3/4) to route the dry audio track through a hardware compressor and then back through the Focusrite Scarlett 4i4 line inputs so I can twist the compressor knobs and hear the changes along with the rest of the mix in my monitors (line out 1/2) and record the result back into Cubasis on another pair of tracks. Can this be done at all in Cubasis? Do I need to use the Focusrite Control app or does it work using Cubasis only? Thanks for any help with this!

Anyone?