Hmmm... I'm not getting this to work.
1) I've got 4 buttons that I want to be my channel selection buttons : C1-C4
2) I've got a knob that's set for channel+presents (CP)
3) I've got a slider, button, and dial that are my controls that are subcontrols of CP above. Again, they work just fine with selection of channel based on CP knob.
When I set up C1-C4 as subcontrols of CP, I set "on" values in MIDI page as C1=1, c2=2, c3=3, c4=4... But because they are part of CP's subcontrol group, they just act like regular buttons like the other one in #3.
I tried wiring up channel selection buttons as supers of channel changer knob, but that just makes them stepper buttons.