Martin,
That's a great bit of detailing you are doing so getting the correct prop makes sense. The CSM one looks to me like an Axial prop or possibly a Heine, your hand carved looks to be the Neindorf prop for a Dr.1. In English we say "the devil is in the details", it's so true! Keep up your magnificent work, your model is one of a great kind, nicely done so far!
Cheers,
Lance