My plane has an all numeric N number. It's kind of a pain to repeat every time I call ATC and I reserved an N Number that has some significance. My wife and I have the same initials (KS) and our anniversary is available so I forked over $10 to reserve the number. Got some points for that. Question is, what's involved in changing over besides sending application and $$ to the FAA and physically changing the numbers on the fuselage? Any Gotcha's? Does the timing need to be carefully managed, like getting the new registration and changing it over right away? Anyone have some actual experience with a switch.