Within expression maps, give the option to change the drum map on a keyswitch.
I recently tried and failed to create a single instrument track which I could use to control multiple drum kits, where each drum kit responded to the same MIDI input notes (mapped on my controller) but had different output notes depending on which drum map was selected. There is no way to switch which drum map is assigned to to a track without losing some information that the notes currently in the track need to have. I was excited to find the o-note conversion feature, only to be disappointed that it doesn’t convert the MIDI channel or voice of the notes; it only converts the note number.