Hi Andi,
Thanks very much for getting back to me. I understood that you can effectively copy the articulations of an entire instrument by means of the "copy root slot" but if you paste it into the other instrument, it simply erases the original articulations whereas I want to add them to the original. Of course it's possible to copy individual patch slots and add to the "type" list but that's more tedious.
I take your point that it's anyway not ideal to mix instruments from the point of view of the Synchron player. The fact remains that in notation software, a muted trumpet is not a different instrument from an unmuted one and cannot be set up as one -- at any rate in Dorico. It is possible to switch MIDI channels (assuming using VE) to a different instrument in the Expression Maps but some have advised against that, due to a volume reset when switching.
Perhaps there is no obvious or ideal solution but I'm interested in what you would do im my position? Of course simply staying with the VI Pro instruments remains an option!
best wishes, David