I am a composer who often like to imitate the style of classical/early romantic composers, such as Mozart or Beethoven, sometimes with new twists. I read and reread the online Principles of Orchestration, and I'd like to know how best to go about orchestrating music in earlier styles. I've studied some of the music of Mozart and Beethoven and have the sense that the orchestration of composers of their time had some shortcomings because the art of orchestration was not fully developed. Any thoughts on how to write orchestral music in such styles? Perhaps there are some suggested reading materials, maybe on the history of orchestration?