Hi everyone. So I crashed up my p4p a few weeks ago. I sent the drone to DJI because it looked above my self repair capabilities. They sent me an estimate and I agreed to have repaired . I did not receive back the same drone based upon the serial #. I knew that was a possibility from reading other posts and I am fine with that. My question is .. do I need to register this drone now with the FAA? For the 5 dollar fee . Or can I use the registration number I already have.? Thank you in advance.