Graeme, excuse my unjustified demand but based on your earlier posts I thought you would be a kind of fulltime-researcher who is having the time (and money!
for such researches. I hope you are enjoying your hobby without being disturbed by other healthyness problems.
I think it is possible to come up one day in the future whith a number which is giving the right impression and dimension of the losses (I am not thinking that these data are reflecting EVERY lost man or airplane).. I have this believe also for the German side because I am convinced that there are a lot of (until now) unused and unknown sources existent in Germany but especially in Russia (captured in or after WWII in Germany).
BTW: I would relate the lost aircraft not only to the killed or missing German airmen (don´t forget the non-KIA!) and we should also take in account that the majority of German aircraft (produced and lost) were doubleseaters and not oneseater.
That leads to two structural questions which obviously were not researched (?) until now:
1. The structure of the numbers of airplanes which were removed from the lists in WWI because of accidents, combat losses (incl. after combat write-offs), replacement by more modern airplanes and export.
Germany removed 27637 but Britain 35973 and France 52640 airplanes fromt heir roles of war. One reason more that I am believing the Germans had a positive kill ratio different to Allied claims (or believes) but only the exact research of the structure of these numbers (if possible) could give more insights.
2. I am always wondering about the enormous high amount of British oneseater (a la Bishop) claims which seems not to fit to the structure of the German airplanes in action. Do you have the structure of your victory claims also refering to claims against oneseaters, doubleseaters etc. and unknown/unidendified airplane?
Answers to these questions could - in my humble opinion - help to come some steps forward in the argument about the amount of airplane losses in WWI.
I think also your idea about an own web site for this topic could be very helpful if that is leading to an exchange of information and more fact-based discussions.