Please have a look at my blogarticle, in particular page 3+4.
https://www.tonstudio-forum.de/blog/ind … XTC-DE-EN/
I have chosen the three example combinations to show that XTC and 12Mic can be used together and I also assumed that someone would work in double speed (88.2/96 kHz // 32 MADI channels) with such a high quality setup.
So you can also connect a third 12Mic, then you are always dealing with the same preamp type, then all of them can be managed via the same web interface.
Auxdevice support for the 12Mic will be delivered later bei RME, it's promised. Then you can also remote control the preamps through TotalMix FX and store/recall the most needed settings in TM FX snapshots.
When connecting the stereo microphone pairs you have to make sure that you connect the microphones to the same preamp.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13