That is a well written article that I agree with wholeheartedly. Even though I took methods classes to learn to play all of the instruments at a rudimentary level, including piano and strings, as part of my music education curriculum, I continued to study the saxophone through graduate school. I asked my mentor one time about my teaching private trumpet lessons even though I am not a trumpet player. He replied that the principles of good tone production and articulation are the same for all wind instruments. Excellence in musicianship also does not change from one instrument to the next. If I can't play trumpet well enough to "model" how I want a passage to sound, he said I can certainly do that on my major instrument to convey the same concepts. Thanks for bringing this to our attention. It is good food for thought.