.......... there's not a great deal out there on the A. Fortunately, the Stuka section of my reference library is the largest part, I am a bit of a Stuka fan to put it mildly. Most of the stuff I have do make some reference to the A and I find the Airdoc books really useful. And there is one Schiffer book which is dedicated to this version. So between these I have manage to cobble together enough to work with.