I immensely enjoy these demonstrations, Davin! They are VERY informative and the explanations are clear and well-thought-through! I must say something, however, to the videographer: The "background music" is so loud that if Davin is speaking, his voice is lost in the tumultuous sounds. When he isn't speaking, I turn the "music" down--then have to turn the sound up in order to hear Davin when he comes back on. If it is "background music" which you want--let it be just that: BACKGROUND. Thanks for listening!