I’ve installed both pieces on my flute, it took less then two minutes. Thank you for the detailed information.
And now my flute sounds great!  It’s like I bought a new one.
I have always had problems with it, always feeling that it doesn’t receive enough air, always going over the sound, trying to get a louder tune. Not anymore! I couldn’t be more happy. The lower register sounds rich and wonderful. Everything is much easier now. The hole sound of the flute changed for the better. I will definitely recommend it.
Thank you again, for everything! I truly congratulate you for this amazing idea! Hope everything goes well for you!