OK, I’ll bite, I have some thoughts on it but would like to know how you were going to do the Key switching if it was supported. Are you wanting to use buttons on the 49 controller? If so you can try using bindings like this that take the CC output from your controller buttons and converts it to MIDI notes that you use to hit the key-switches. The only worry is that you don’t use want CC numbers that the Hammond plug already has reserved so that would need attending to. Anyway this works for your case I think if I’m getting it. In effect your are adding the extra couple of reverse colored keys to the 49’er using the buttons …
Dave