Yes, I think that I am starting to catch on to this "fancy" stuff now.... With your note Nick, drop the first zero, add a seven to the end, and switch places of the five and six.....
Say you are looking for radar notes though.... What is a person to do about those pesky prefix and suffix letters? I really don't see anything at all radarish about D12344321C..... Are not the prefix and suffix part of the serial?