Thank you John.
I think you may be right on the black outline on the invasion stripes, if you look at your second pic, you see a black corner just next to Capt Lederer's shoulder which might just fit the bill..
I also notice in that same pic that the stencil 'gun camera' appears to be below the camera rather than next to it, one more thing to change.
As for the white circle, I have been thinking of a camera as well, but wasn't sure. Recognition lights? I thought these only came late in the war, and this clearly is a 1944 shot, with the stripes and no fillet yet? We'll probably never know, I just made them white..It could of course also be a patch over a flak hole, though these usually seem rectangular...questions, questions..
from the first pic I get the impression the data block is a bit higher than usual too, or is that some other text?
Another fun thing I noticed were the black dots before and after the nose art. You see the same on "Frankie" and other aircraft, such as "Sweet Thing IV", I wonder what that is about?
Anyway, enough details to sort yet...