Why on earth do you have 'Erdnase' in your name when you clearly haven't actually read the book?
You've asked a few questions now, the answer to all of which can be found in erdnase...
Excuse me people, I have the book, but I take account of particulars.
If you can see the fingers which cover the angle in the video, they are set in a little different position compared to erdnase way to deal.
I put my frist finger and middle finger like in the video and so I wanted to understand if that is correct.
Thanks ........... and excuse me again for my questions ........