Morris, All of the kidding aside. Yes, I do know a guy that plays a very FAT Double C! I am sure that he can play higher than that but no one that's not within ear shot of his practice room will hear that. This guy has a real lead player sound and a DHC range that sounds good, no GREAT. I went to see him 5 wks ago for a lesson, (first time I had seen him in 38 years). He was a little unhappy with my M/P, but was very professional about it, and said, "whatever works for you". He then proceeded to demonstrate the fat tone he has in the extreme high register. The first time I heard his DHC I thought it was only a High C. IT IS THAT FAT. His Name is Ron Turner. He and I went to High School together. He has been a full time pro trumpet player since then. I have not although I do play regularly.