Hi, I'm a sophomore high school Euph player. I've been playing Euph since 6th grade, though I haven't been properly taught until 9th grade. I'm trying to expand my range on the instrument as the pieces I want to play require the player to have a good consistent upper register. Currently, the highest note I can play sort of consistently is an F. I can hit B-Flat, but it is very thinly sounding note. I know the Euph has a wide range, and I'd like to take advantage of that. How can I properly expand my range on the Euph?