Great lesson! Been a while since I heard that one. Some food for thought, have you ever heard the original version? "Oye Como Va" by Tito Puente, in 1963. No guitars, just horns and flute. Of course there was the percussions. I first heard the original in '65. Santana did his version in......I believe it was '70. Lot's of times I only hear somebodys 2nd version before I hear the 1st. This time it's the other way 'round.