Advice sought re KG40

[GWilliamson]

Gentlemen,

I recently acquired a set of documents to a Feldwebel Werner Bünger, an air gunner who served first with 1./KG40 and then 3./KG40.

I know he will have served on the FW200C but have read conflicting info regarding the use or non-use of the He177 by 3./KG40.

Unfortunately I don't know when he transferred from 1 to 3./KG40 but the earliest of the documents which show him as 3./KG40 is May 1943.

I'm trying to establish whether there is any likelihood that he may have served on He177 in early 1943 if the info I have read that 1./KG40 converted to He177 at the start of that year.

Secondly, I wondered if there is any source that I might consult which may have records of specific aircraft codes and the crews allocated to them ?

This chap by the way, did survive the war ans the latest document in the set is dated June 1945 and was issued by the "Kommando der Schiffe und Boote der Luftwaffe".

I'd be grateful for any advice.

Many thanks