Just a further point and question! I have set up the two RPis running Astroberry such that one is fixed to use only the 5GHz band for its Hotspot, and the other only the 2.4GHz band. In the first case, I did this after reading posts (e.g. from Doug) about the interaction/interference of the 2.4GHz WiFi with the USB3.0 ports. In the second case, I have to use 2.4GHz in order to communicate with the Sky-Watcher AZGTi mount, which only works with that frequency band. Is there any way to operate a single network with the two RPis and the AZGTi and a laptop in dual bands simultaneously?