Solved
That took some steps more than I expected 
But, hey, it’s done.
Happy to help if anyone needs a hint
Solved 
Fun challenge. Having read through these forum pages, I was able to get it within a short amount of time. Yet I don’t understand what’s up with the trap I fell into at the very end. And that was what actually cost me the most time.
Boom Solved (For those asking what on earth the Vid is all about, there is an important answer there. Keep looking! This was a blast!
I am probably missing something, but I can’t seem to get anything useful out of the Mona.jpg. Can someone give me a hint on tooling to use?