thanks for the input!
I just haven’t figured out, what happens if users on my small instance would join larger communities in other instances. does the small instance needs to mirror or route the traffic to the other instance, or is this only done through links and on the small instance is really only the stuff local users generated?
you got also give arandr a try, as it is a GUI to xrandr and you can move your virtual monitors around a bit, until it matches the physical locations/orientations