What is the difference between the Monette Prana B4, BL4 and the Monette PRANA BL4 81 Hession? Is the Monette PRANA BL4 with the 81 backbore the piece he uses, or is this actually his model? I know the BL is shallower than the B, but how does the 81 backbore change the playing characteristics of this piece? I had a talk with Patrick about a month ago specifically about Monette Pieces and Monette trumpets. I can't believe that he didn't mention that there was a model with his name on it. I know he is a great believer in Monette products, but if I was good enough to have my name on a Monette model I'd make darn sure everyone I spoke to knew about it!