Not all Dutch airfields were used or constructed by the Germans. The construction of "de Peel" started in 1954.
I have FSX installed, but except for some testing I hardly use it. I prefer my teweeked FS9 which is party early sixties and partly WW-II. Most of the beautiful FS9 scenery, by Cees, Ian and all those other artists, won't work in FSX. The Fokkers by Wimand Paul don't work in FSX.
All reason for me to stick with FS9.
Don't get me wrong; I do fly FSX as well, but definitely not with the frequency I do fly FS9.
Huub