I'm about to upgrade to a new audio interface, something with several inputs, outputs and inserts. I wanted to use my M9 as a mixing device, as the effects are great and you can make a pretty juicy channel strip with the tube comp and api eq. Has anyone used their M9/M13/M5 in this way? If so, were the results good or bad? (Apologies if this has been talked about already - I can't find anything on this subject in the forum).