Hi Ronald, The funny thing about trumpet playing is that you have a lot of technique and musical knowledge and still have deficiencies in your sound production/playing machine. For me I really have a problem playing consistently above High D/E, even though I can play for hours below those notes – no matter how much I practice any improvements are very slight. I think this is maybe more to do with my lips/teeth/jaw structure than overall approach, but any benefits I can gain from this method are useful – I study lots of methods/approaches and take the stuff that works with me. I really believe in Gregs approach and the ‘non forcing’ mindset can only benefit all players. Good luck with your trumpet adventure!