Hey David,
That did the trick, thanks. Since I'm still getting up to speed, I had to brute force a few things I'm sure but it's basically doing what I want now. For some reason the MOX was triggering a drum patch with a performance mode master when set to Ch16...so I blanked out the active keyboard range in that zone to fix it.
One interesting observation, when the MOX MIDI toggle is set to USB with a USB cable to the computer and a MIDI cable between FA and MOX: with computer powered on there is no note Tx to FA. When I power down the computer, USB toggle still set on MOX, it is transmitting note Tx through MIDI. Assuming that is normal?