Ostap, your questions can be fascinating, but how about getting some of your previous ones satisfactorily answered before you pose yet another? (You do have a tendency to ask a lot of follow-up questions for each of your original questions.)
There are a limited number of members trying to answer a lot of questions from people who may be asking their first question.
I am NOT trying to stop you asking questions or follow-up questions, just asking for a little breathing space.
Student or Learner