Alice, I've had a vocal coach for 10 years and you have have just offered hundreds of dollars worth of free advice. I agree with everything you've said and my coach would also concur. I would only add that these techniques take a long time to master and not until you are aware of everything working as it should do you realize how long it actually takes. When I am singing for an audiance I am very aware of how my body is working, if everything feels right then I know I am making a good sound. If my back muscles don't ache at the end of a performance then I know I haven't work as hard as I should! Some singers are blessed with all the raw ingredients of a great voice, but it takes loads of work to produce that thrilling sound that makes people sit on the edge of their seats wanting more. Thank you Alice ... I'd love to hear you sing!