my iCM4+ is almost full, but it's possible (probable...) that I'll add some more midi equipment to my rig in the near future. What are my options? This is a a DAW-less, live environment. I use iConfig on iOS (non-negociable). For my current application I don't need the Audio pass-though feature nor the ethernet midi unless this helps to seamlessly integrate the ports from a second interface. Thanks!