You’re welcome. I was just thinking about this thread as I was playing Clarke’s Second Study–I caught myself blowing rather than releasing air. Things were not feeling well, I felt like I was inefficient and things weren’t feeling good, I was feeling tired. I realized I wasn’t releasing the air; re-focused my attention to what I was doing, and suddenly I felt like I had a second wind and wound up playing the 2nd half of the exercise, which goes up above the staff easier than the first half and felt like I could keep going. A small difference in perception and approach makes a huge difference. You may find the same happens to you. Good luck.