Hi Tal!
Thanks for your reply!
This is a post-production of a classical music concert recording. The Decca Tree and my room mics are a given, no change. But the position of the spot microphones for each instrument group and instrument changes according to the number of players and the seating arrangement of the orchestra. Such a change can be up to 4-5 in one concert.
So far, I’ve thought of keeping Decca and the room pair in one group, and then keeping the changing spots in a separate group. But as a result of experimentation, I’ve come to the conclusion that it’s better to count the spots and the Decca, room pair for each formation as one.
Thanks to the built-in preset banks and the import/export function of the presets, it is easy to store up to four orchestral formations. And if preset switching could be automated, it would be heaven! 
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