Hi sometimes trumpet advice is like the end of the movie " The Devils Advocate where Pacino says about God taste but don't swallow " touch but don't take" .....here us my point I see numerous threads or links on the internet about emboucher : ex." lips should touch " 2. lips shouldn't touch...3 lips not touching teeth open 4 teeth clinched lips open. So is it what works for you? Or is it all of these? Just curious.