A long successful day ends 
Today I created a bigger B3 rackspace based on the Arturia B3, a Master Rack for a second instance of GP.
Both use intense GPScript to fulfil my needs:
- mapping widget texts to plugin parameters (Leslie speed, Chorus types)
- using relative MIDI encodprs on my Arturia KeyLab MkII
- starting AppleScript Snippets by MIDI to switch between GP and mixer/soundcard remotes
- remote controlling Apple music for background music
I unfortunately also have a minor issue with syncing plugin and GP widgets - we are already discussing here: Sync Widget Drawbars to Kontakt B3
Here are two impressions
Currently the two instanced do not interact. I considered some things like routing MIDI by IAC between the instances, or use loopback audio to get a real master in my 2nd instance. But currently this is OK.
Next steps will be recreation of some of my MainStage patches / concerts and MIDI navigation
Last Question for today: as far as I can see the global MIDI preferences in the instances are independent (I assigned a controller for Panic in my Main instance, which shows not up in my 2nd instance - which is absolutely OK),
BBB