Very glad you enjoyed Dr Syn's very lucid descriptions. He certainly is a whizz at it. Fortunately for me, he is a very close friend and I have to "put up with this all the time"
And I love it! He is an avid space nut who has seen many launches, has many friends who work at Cape Canaveral and has a book of stories to tell. And........he drives a B767 for a living.
PPRuNe you see, has so much talent in aviation, you cannot fail to be fully informed.