I bought this purely because I read the below forum post and saw that it was possible to side-load the bridged-WAN connection option.
Now it seems that the patch is not supported by the newer firmware (my experience and a few others - Server 500 error on curl request).
Is there any other way and will this be supported ongoing, or should I send this back to Amazon?
PS: My goal is simply to put the X3000 in between my Google Fiber port and my Google WiFi router, with fail-over to 5G via Google Fi - with no double-NAT regardless of the connection. My work requires no double-NAT for VPN.