I think it should be possible to add custom scales to the Erae Touch. There are amazing possibilities with being able to set the scale manually. It could even be possible within the firmware itself as in on a page on the Erae screen where you can do this, where the user sets a scale manually by tapping on buttons that represent notes that are included in the scale and tapping off notes that are not. Of course, the octave/key wouldn’t change, just the scale notes.
An easier way would be to do it in the lab. Is there any way to use a custom scale?