Hello Fernandino,
I hope you, and others, understood what I was trying to show with the links I did put in my former post.
The picture I was talking about, taken in Plauen, is supposed to show K-4; if it is then the "Bagage compartment" is not that square.
In the same book, O'Nine Gallery by Hitchcock, P. 50, there is another picture of what is said to be a K-2 (Well it's an old book!) "Luisl" shot down 24.12.44 over Eupen where the "bagage compartment" is not that square. But perhaps it's not a Bf109K...
Still in the same book, P.51, there are three pictures of a 9./JG 77 Weisse 3, a Bf109K-4, whose picture can be found in Poruba & Janda, 1997, too, whose "Bagage compartment" entrance is not that square too... You can see it here
http://www.me109.info/display.php?a=e&fid=867
So! Seems to me that not all the Bf109K-4 got that particularity and, by the contrary, it's not because we've never seen it on Bf109G(-10)s that it didn't exist. Or, once again, the three said examples aren't Bf109K-4 at all (Sorry Mr. Poruba)...
And yes Fernandino, as you do, I prefer a "White 66" than a Yellow one.
Of course, taking account of all details I pointed in my previous post, one may understand why I continue to think that the "frontal" one is the third picture of "Weisse 66".
Cheers All, Franck.