CatKnight, you've noted that French pilots must fly from Etampes to their assigned aerodrome, however the field at Etampes is not in WOFF. Might I suggest Saint-Inglevert instead. I am planning on having my pilot serve with MS23 which will be based at Lahoussoye on 1 February, 1915. Flying from Saint-Inglevert would offer a cross-country flight of about 160km with a duration of about an hour and twenty minutes.
Oops! You're right. I must have had my test pilot in 1917 when I saw Etampes.