I usually try not chime i unless asked, but you seem to really want to get this one closer to a version you are comfortable with. I can offer a couple of pointers. This profile represents a hyothetical version of Hauptmann R. Berthold's late Schwerin Built Fokker D.VII. The empty white space on the top wing was filled with a dark version of the Winged sword like the white ones on the fuselage. We know from combat reports and persional diaries that still exist. If you are interested in Berthold, Jasta 15 or 18 or JG II in general see;
Jagdgeschwader Nr II Geschwader 'Berthold' (Aviation Elite Units) by Greg VanWyngarden" Osprey pub.
The only image of Berthold's Fokker D.VII is an early type with less louvres and Fokker camo streaking on the fuselage. We do know as a JG Cmdr he had several assigned to him up through the end of the war.
For a little more detail on him here is a bio that is pretty accurate.
RudolfBerthold