Yes!!!! I so agree!!! Thanks for sharing as both Local and Vulgano comments are key. Now to maintain the endurance, I recommend massage. I have been doing this regularly for two months (as well as rotate in a single practice among 6-7 mouthpieces). During the other instrumentalists solos I massage my upper AND lower lips (thumb under inside of lip, finger on outside surface) and gently but firmly push reactive edema away, AND increase healing blood flow through into the area to remove excess lactic acid. This maintains what you have built up. My endurance to finish a four hour gig, only to play another gig then next day has been saved by this technique. I no longer dread ending a four hour gig with Povo!