thank you for your ideas. I also thought about chaining but was not so sure if it works well. Please see this, indilib.org/support/tutorials/159-indi-on-multiple-devices.html
is that what you are talking about? Is it necassary to run on both RPi's Kstarts, Ekos etc? And how important is it have ssh running flawlessly?
It works on my mashines but not to 100% reliable. Could you provide please the startup script?
Also interesting is the direkt Ethernet idea. You menshion the cross over cable. In the docs I only find regular LAN cables but plugged direct from Pi to Laptop or so.