Did you ever find a solution? I have the exact same setup as you, and I, too, have only one unit passing audio to my daw. I can use either unit separately and they work the same. But when I daisy chain them as you did, I do not get audio from the second one to my daw (REAPER). I do notice, however, that the MR Editor does show signal when I apply it to any channel on either of the 2 units. I am stumped… Have spent countless hours on this,… And I am thinking it’s something silly I overlook.