Well it aint over yet.

Follow on to this is that if you uncheck "ASIO always on" you lose sound in edit notation mode. It isnt that complicated to just check it/uncheck it as required, but I just think somewhere along the line when I havent had to do it for a while I'll forget.

BTW in the end I didnt use ASIO multi client (nor Midi Yoke which turns out to be a red herring)

Now.... is that a fat lady I hear singing?