Thank you for a very interesting article. Yes it does raise many questions which will probably never be known. Having an amateur historian interest in small arms development from 1850 to 1920, the Great War, and subsequent arms development for early aircraft fits in that category. All of the experimentation done to fire through the propeller arc, is fascinating to read about. Until the development of a synchronizing gear to allow the gun to fire only when the blade was out of the bullet's path, was the only fool proof answer. Still, the wire wrapped blades and deflector plates were tried and 100% successful solution eluded both sides.
In a way, it's saddening to read, that the general friendliness between pilots on either side, didn't last. Sad to think that one of mankind greatest achievements of the early 20th Century, Flight, became weaponized in a matter of months.
Thank you again for this historical tidbit.