Well, I don't recall anyone ever talking about ferry pilots until FLS brought it up.
Lyric has done quite a bit of research on this aircraft including contacting the only living Luftwaffe pilot that actually flew it in the war (I believe that's the case). So far the consensus is that the aircraft never had guns (the B model) and since it is the only aircraft to have been flown in combat there was never a combat aircraft that had guns. Therefore the guns, as far as I care, should be removed when the aircraft is updated. It should be a very fast jet-powered mosquito type, but not armed with guns.
I listened to the US pilot that flew the airplane in the states and his comments indicate that the airplane is wonderful to fly, as is the HTC version. I have no issues with the way it is modeled, except I think the guns are fantasy items and should be removed.