Hi Eric,
Incredible work you are doing here.
We are monitoring this thread with much interest because we discovered what seems to be our own aircraft in the logbooks of David: USAF 67-21300.
Thanks to you we have managed to get in touch with him.
We operate the O-2 from our home base in the Netherlands.
https://www.instagram.com/postbellumfoundation/
If you are ever in the neighbourhood, feel free to get in touch for a hangar tour.
Also if you need any close up pictures, let us know.
Erik Brouwer
Postbellum Foundation
Secretary