Just thought I'd chime in to say everything worked well when I plugged it all in based on my above methodology. Two separate networks, WiFi ssid's different to keep them straight- Optik boxes on one network, the rest of my LAN on the Google WiFi net...
I'm following this as well because I'm trying to do exactly the same thing. If you simply plug in the Google/Nest WiFi into another port and create a whole new wireless network, that new network will have it's own Subnet. So your main router will b...