I wish I had come across this earlier. Right now I am exactly in that mindset: Oh, I can't play La Scala so I can't get an orchestra job. Seeing these heroes say "actually I double tongue Mozart and my single tongue is a snail" gives me so much hope! I shall be thinking about playing relaxed, with great air flow and using my tongue as close to the single tongue position for the Ks as possible. Thank you so much for sharing this!