What is best way to contact Oleg and his team ?

BOBC, historically accurate cockpits it's just a publicity gimmick, and btw, as the expert that you are, you're certainly aware that there were on the field variations here and there, not to mention factory variations as new Spitfires were built and delivered to the RAF stations.

Having said this, Oleg is a no-nonsense person, he wants facts, reliable evidences (a picture is not enough sometimes for the aforementioned reasons), and above all manuals which show the technical layout of things. I don't blame him for this, years of experience must have taught him a lot, and I'd rather go myself for the manual than for a picture of a one off example which doesn't have further evidences..

I haven't followed your saga and dunno how long you've been pointing these issues, but if you didnt receive an answer by now.. having said this, you might see your changes in the first patch coming, you never know! As things are now they're proceeding by priorities and there are way more important issues that need to be addressed before the first release.