I've had the code 180 error after updating the firmware for the remote ID thing. I then downloaded the latest version of GO4 for the smart controller right from the DJI website using the built-in browser. After installing that it was all happy...
Worse case scenario, and Congress doesn't come to their senses and cooler heads don't prevail, there won't be any firmware issues.
The only real issue with what you're wanting to do (I know many who have brought their drones in from other...