[ggrs]

Yes, you can feed several places. My raspbian is feeding adsbexchange as well as flightaware, fr24, radarbox, planefinder and open sky network.

[jcims]

Sweet. I just googled everything at the end there and found this, look reasonable?: http://gordon.celesta.me/2018/04/13/raspberry-pi-real-time-f...

[ggrs]

Skimming those instructions, they don't look bad. The github repo linked above is James' from adsbexchange, so between the two you should be set.