"Virtual ground" - that takes me back a few (many) years, Radoslav. Nice one!
This is a very interesting post; I've looked at it a couple of times, but I'm still not sure what you're advocating here.
Was (is) this a repair, a experiment, or a means of testing the circuit?
I'm guessing that the circuit diagram shows the preferred solution. Am I right in assuming that the second .jpg corresponds with the circuit? Otherwise, what is the first .jpg showing?