You don’t need a separate pedal. All you need to do is make sure the MEGX is connected to the MMGT via MIDI with no other MIDI device connected between. There’s also a box you need to check in global, I believe, but I can’t remember what it’s call. I think it’s “enable bi-direction messages” or something like that. That box allows data to travel from the MEGX to the MMGT. On the buttons page, you’ll just create a button for the tuner under the MEGX.