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The John Petrucci Guitar Method - Episode 6: Scales on 1 String, 2 Strings, Playing in 3 Octaves - YouTube
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Creative Guitar Studio: VIDEO: John Petrucci Demos Ernie Ball M-Steel Guitar Strings...
Ernie Ball 7-String Regular Slinky - John Petrucci
John Petrucci discusses using an 8-string for the first time ever on Dream Theater's upcoming album | Guitar World
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John Petrucci Lesson: How to Play Movable Chords with Open Strings | Guitar World
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John Petrucci talks about PARADIGM Strings - YouTube
