@33:34; Why do people say that the smaller bell (7.5") and bore (.500) size is equated to beginning trombone? Jay Jay Johnson, Bill Watrous (.509), Frank Rosolino, Dion Tucker and Michael Davis (who plays a Shires Michael has a model), and list goes on, all play small bore trombones. I know that the commentator cannot be considering tha these are beginners. And is he saying that orchestral, symphonic music is more advanced and on a higher level than jazz?