Hi Steffan, thanks for the response.
This might be of use to Ableton users:
I hav made progress. I guess my use of the desk becomes a little bit more sophisticated over time. I realise now my issue is understanding the ‘state’ of the machine and where I have to compromise.
I have to choose between usb or local whereas I want to use both at the same time. (I thought when I switch from one to another I would only be switching control not actually choosing.)
The point being: from an Ableton DAW perspective multiple DAW outputs are actually counted towards the number of inputs available on the Desk.
I think looking at this in terms of connections and virtual connections being the limitation was incorrect when actually processing power make more sense.