MusiKMan: I'm certain that you could use your Trinity to control your I30 arrangements and vice-versa via MIDI. I'm not a Korg person but I assume the Trinity would be the better sound source choice and that it has the digital outs that would be what you'd use in a studio environment. The only problem is that you have so many, maybe too many, options to choose from with this setup. I would think about creating a pencil diagram of the different functions you would like to realistically use (ie: control start/stop and/or verse/chorus style changes on I30 from Trinity, have midi output of I30 play sounds on the Trinity, etc.) and then go through your owner's manuals and decided which parameter settings matches each desired result. Keep a MIDI-diary of the changes you make and be sure to save your settings as your "studio setup". MIDI settings are not really that difficult and you will know MIDI in general far more after you've bulldozed your way through this process.