First, let me say thank you for all of the advice I get from each and everyone of you. It is helping alot. I have bought a new, different size, mouthpiece; completely off of a post I saw from one of you guys. It has worked out so far. So, thank you guys. Now to the subject of this post. I have gathered through various post that long tones are something both endorsed by some, and not by others. However, everyone has said that they will both increase range and endurance. Both issues that I need to improve on, as I have recently picked the horn back up after a 15 year break in practicing. I remained a Trumpet player, just got tired of practicing. So, as a result, I have included long tones in my warm ups. It is the first 15 minutes of each of my 1 hr practice sessions, I do 2 of those daily. I know it depends on each person, so no definite conclussion will be able to reached. However, in the opinion of those on this forum, is that enough time dedicated to long tones?