Hello! My spouse submitted his N400 two days ago under the 3-year rule. His I-751 continues to be pending but he is eligible to apply and we did it online. We did not overload the petition with additional overwhelming unsolicited information. We are gathering everything additional and will bring with us to the interview as the webisite mentioned that we could either add unsolicited documents or bring them to the interview. We only stuck to what the system requested. We did send a very thorough I-751 package for the removal of the conditions, but that has had no movement since filed over a year ago. I will keep you posted on any communications we get. We live in Miami. I hope the wait is not too long here.