I should have pointed this out at the beginning, obviousness aside, but I am not working on K-4. I am working on the Morse Code decryption that I believe follows K-4, and it wasn’t something I rushed or did over a period of a few days. A lot of rush to judgments on this forum.
I saw the Morse Code patterns when I compared the panels. I haven’t read anything anywhere that says that K-4 has to be solved before K-5, in fact, I haven’t read anything mentioned about a K-5 until you mentioned it now, besides the work that I have posted. So the reason you didn’t see Berlin anywhere, is because I am not working on K-4.
The Morse Code make perfect sense statistically, which I have proven through the analytics so don’t jump to conclusions that it doesn’t make any sense if you don’t understand it. I predict that the work I have done will be used to solve K-5 at some point in the future, if in fact K-4 is needed to finish it.