I am the second owner and I don't know if the previous owner sent it to Nikon or not. For $500 you would think that the buffer upgrade would have yielded a significant improvement over the number of shots that could be stored before the buffer filled up. That being the case one would assume that there is some way to figure it out.
Graham From St. Augustine, FL. "I like photographers, you don't ask questions." Ronald Reagan to White House Press Photogs