UPDATE : after 2 more weeks of daily practice.

After understanding passive breathing and it’s potential, and practicing singing series for 1h first thing in the morning. (instead of book 1 and 2)

I can play up to G above staff with almost no effort . (prior to this I could go to the F but it was forced and never G)

What is strange is that at the same time I am still stuck in the middle of the Allegro Singing series…

ANYWAY It’s being great and I am going to continue this process.

My endurance now is better than ever before.
(I forget everything of singing series when I transition to my technique practice
I use FLOW STUDIES BY CICOVITCH To transition to my normal playing.)