Thanks!
In the majority of libraries the close microphone is mono, but it's of course not standardized. The Silent Stage recordings for me are not really close enough to call them "close" microphones as in other libraries, it's more like a "mid" microphone (depending on the instrument). A dimension violin on it's own would be a contender.
Reducing the width doesn't work, because I don't want to have the sound changed. For me the sound impression from MIR Pro (as it is) is like a mixture of "mid" and "room" microphone sound, even though the close microphone is already mixed in. And I like this sound. But I would like to have a separate mono microphone which would resemble the "close" microphone in other libraries.
I think I would need two MIR Pro instances then:
1) Sound as it is, instrument width unchanged = "room" microphone like a decca tree
2) Only the main microphone, but the instrument width reduced to mono = "close" microphone
Maybe I'm thinking too complicated! :D