Hello, I was recently adjudicated at a festival. One of the tune's we played was Birk's Works, an F minor Blues. The judge explained how we could use an Ab pentatonic over the Fmin7, but if we really wanted to go out we could even use A pentatonic. I'm not sure how this works, or if he was referring to a major or minor pentatonic scale. Do any of you have any experience with this?