@David-Healey
Thanks for giving it a try – yeah I've been trying something out in Scriptnode – but succes here yet. Maybe I aimed too high for my current skills hahah :-)

I figured out the problem. When changing presets I was purging/loading mic positions, but for the sample map without multi-mics it was freaking out, so I prevented the purging happening when the sample map has only a single channel.