Collating the answers from Gib210 and Matty Koff, both hubs should be set to MIDI out? One post says one thing, the next says differently. I figure to have a channel designation to give me the most options in this learning experience. Would that mean having both hubs on the same channel would get the correct presets combinations, granted the scenes are saved on both units for a set of parameters? Thanks to all for the assistance.