You can also use the flip with the googles 1 using the rc controller without the hdmi output as the rc- n3 using screen mirroring on an iPhone. This requires no tethering from the controller to the goggles at all
I was able to get the flip working with Dji goggles 1 and the rc-n3 controller allowing the flip to work with the fpv goggles 1 based on iOS screen mirroring. This did not involve linking the rc-n3 controller to the goggles.