Nick first up, thanks. I swapped cables last night and reinit & refig’d a couple times. Before I did anything else this morning I swapped boxes with #2 getting the direct MIDI connx with the 6X and #1 getting MIDI IN from #2  using the same cable as I had last night. That works. So one could jump to the conclusion that H9#1’s MIDI OUT plug/circuit is wacko, but I want to wipe #1, reload its Preset List, and reconfig. Once I do that I’ll repost here… Keoki