Actually, I got it working on my own after many attempts. The main differences in my approach this time as compared to previous were the following:   1. I made all necessary changes to the TP-Link modem before attempting to connect the Google Wifi system. These included: turning off wifi; disabling DHCP; adding the Google Wifi IP address as the DMZ host. 2. When performing a factory reset, or turning off and on the Google Wifi Pucks, WAIT FOR LONGER THAN YOU THINK YOU NEED TO. I think I waited for close to 10 minutes just to make sure the Pucks were ready to go before advancing through the steps. 3. When I set up the Primary Puck, this time around I was able to get into the advanced network configuration settings, because DHCP was disabled on the modem/router. I chose the Static IP configuration option. Hope this helps someone! ... View more

mhucknall, I have the exact same problem (though I'm not with TPG). If you manage to get it working please update us here! ... View more