Winstun my old son,I've been following this thread for some time and I think I've got it!
"Being a model pilot......." you fly model aircraft
"Linguist? No." Definitely not."Mon reason d'etre......"In this case I think"Ma raison......." is more appropriate.
"Astronaut collegues (sic)
Methinks you are a Space Cadet as my kids would say.