bill-cary,
Sorry that you are having issues using Google WiFi Mesh Routers.
Just an FYI:
I have 5 OBi devices {2-OBi202's, OBi200, OBi110 and a OBi100} working on our Google WiFi Mesh network without any issues.
I switched from a Netgear Nighthawk R7000 to Google WiFi Nov. 2016 and the only thing I did was reboot each of the OBi devices. I didn't have to make any changes on my Google WiFi Mesh Routers to get the OBi devices to work.
Later, I used "DHCP IP reservations" to assign the IP addresses that I preferred on the devices.