Hey, I am working through Claude Gordon Physical Approach. I am up to Lesson 7, stuck at the bottom. Top Space E was the final bar I could complete without my throat feeling like its blowing up. I tried the Top line F but it literally feels like the air is separating my tubes. I am now working on the Trumpet Method, warmup exercises and Etudes by Anthony Plog. Everything seems to be coming together well and it is a little hard to believe the sound that is now happening is actually me. These are 2 great books to have a long side the Arbans. I kind of like having more than one book, feels a little more 'resourceful' going through more books. It feels more like I am 'doing school' as such having more than 1 book. Very excited. Just like to thank everybody here for trying to help as much as was possible 'on line' but I can now see why, particularly for trumpet, a teacher in person is a must.