Here is what I hear (I have an mp3 player that gives time in seconds, tenths, hundredths and thousandths of seconds.) I will give times in seconds, tenths and hundreths. It is not worth bothering with thousandths of seconds.
1. The clarinet solo ends at 3:43 (3 seconds and 43 hundreths of a second).
2. The cornet starts at 3:53. It stops at 4:72 and resumes at 5:46.
3. I hear what I believe is a clarinet playing a long note between 4:21 and 6:00.
4. The ensemble starts at 6:02.
At 2/3 (.67 seconds) after the clarinet ends (which is 4:60 seconds in this fragment) I only hear the cornet and the clarinet.
Do you agree, disagree? What do you hear?
I am not trying to make trouble. I want to make sure I understand what you are proposing.