Many thanks for your response.
Firstly my apologies for a typo. I should have said he was first with 2/KG40, not 1/KG40
I can't claim any depth of knowledge on the subject as my main field of research is on the U-Boats, but according to
http://www.ww2.dk/air/kampf/kg40.htm
3/KG40 was reformed in Fassberg in January 1943 equipped with the He177. I checked Nafziger and found the same information, though there is also a reference to 3/KG40 at Vaernes "probably still with the Fw200".
The last of this guys documents which refer to him with 2./KG40 is his Iron Cross 2nd Class award document dated November 1942. Next in chronological order is his Silver Bomber Clasp document which is dated May 1943. Unfortunately I don't know when - between Nov 42 and May 43- he transferred from 2/KG40 to 3/KG40.
Assuming the info regarding 3/KG40 reforming with the He177 is wrong then it looks as if this guy was solely on Fw200. My interest is more in the Condor than the He177 anyway, and what drew me to the document set was the use of Fw200s in co-operation with the U-Boats -my main field of interest-so if he was solely on Fw200s it is actually more interesting for me.
So, that leaves me with trying to do some further research on 2 and 3/KG40 to see if it is possible to track down any information on the specific codes of individual aircraft for these Staffeln (I'm aware of the F8 code) which might cross reference with the crew members, in the perhaps vain hope of finding a photo of the aircraft in which this guy flew.