I have just returned from Spain, where they have a Fokker C.III, which is the successor to the Fokker C.I that the O-Maskinen was based on. The wings, fuselage and empenage looks really similar, while the the engine, cowl, and engine cooler were much improved on the O-Maskinen. I will go through the Fokker C.III photos and see what the differences are, and what bits are identical, and can be used as the basis for the O-Maskinen model.