Hey Doug,
Here’s a way to do it. In your Song the Instruments rack (my example is called Keyboards) is loaded and has multiple states for your different instruments. Each rack state has an index number to call it with assigned to it and is determined by the list order. So the bindings use this to call the desired state that has your keyboard of choice using these index numbers.
So at the song level you create bindings like this that call the states up by using index numbers for each pad CC number or note it sends over as a trigger.
Dave