Thank you Pete!
I was planning on downloading all of these, you saved me the work...
I'll let you know how I make out with the MIDI setup once the Pa4x arrives. Thank you again for checking in to the setup.
My stacked plan was the same as yours (Pyramid Style) with the larger keyboard on the bottom, which is the Kronos for me.
It sounds as if you may be utilizing the Sound Engines from the Kronos, while playing your Pa4x which I think is a good way to go. I might have to play with the LOCAL setting setup to see if I can do the same, I think what we discussed will have me playing all of my sounds though the Pa4x, unless I leave LOCAL ON which will likely then play both keyboards.
More to come on this - I will move this portion of the post to the appropriate thread as well.
Just wanted to thank you for your help in both areas

Dave Kalbach
Music Newbie
Bear with Me
Kronos 2, Pa5X, Drumlogue, Stageman 80, Korg D32XD Recorder
Many Guitars, Roland TD-6 V-Drums, a Trumpet (HELP)
And a Kimball Baby Grand Piano