So I think I know the answer here, but I'll throw it out there anyway.
Hypothetically, if I had a reface CP, and an old korg M1, and I want to play the cp sounds from the m1 keyboard...easy enough.
But can I also play the m1 sounds from the cp keyboard at the same time?
I'm guessing no, because in each direction they need a common midi channel, and I suspect one cannot assign a different midi channel to the sounds versus the keyboard on the reface line.
And second question....any likelihood of more reface models.....hint hint hint a "mellotron"?
Again I'm guessing no (and even if yes you couldn't say)....but if there was a reface rompler with orchestral and non keyboard instrument type sounds, the reface line would pretty much have it all covered and I would seriously contemplate an all reface rig (albeit probably running the cp through a larger keyboard)
I just love the concept of a non workstation, multi keyboard rig demanding very little real estate.