Help integrating Kronos and Casio PX-5S

[soundspossible]

I was hoping to write this awesome how-to post, but it has instead become a cry for help because I can't figure this out!

My live setup includes a Kronos 61 and Casio PX-5S. I've got bi-directional MIDI and I'm using both boards as tone generators (I could into why I like getting sound from each, but that's not really what this post is about). I've got all my Kronos combis setup to send program changes to the PX-5S. This works fine, and it is exactly what I desire. I can also control the Kronos from the PX-5S without issue. Again, exactly what I want.

Here's where the problem starts. The Kronos always transmits note data from the global ch. I happen to have this set to 16. The result is that the PX-5S part set to ch 16 gets played by the Kronos. I don't want the Kronos to play the PX-5S. The PX-5S stage settings always have tones responding to 5-16 and the only way to disable them is to use the Mixer function. However, the mixer settings are NOT saved at power-down, so I have to remember to do this every time.

I tried changing the Kronos global ch to 4, since I can save how the PX-5S responds to that channel. Unfortunately, the PX-5S also transmits program changes from 1-4, so it throws off the Kronos if I need to change patches on the PX-5S. Turning off program change in the Kronos global settings fixes that, but then the Kronos also doesn't transmit program change, defeating the whole purpose of my setup.

So, I realize I could use the Kronos as my sole tone generator and just use the PX-5S as a controller. I could also set the Mixer settings every time or just forget about sending program changes to the Casio. All of these would "solve" the problem. But I am not ready to give up.

Any ideas or Karma voodoo would be appreciated. Thanks for reading the long post!!