Hi Johnny,
I was noticing how in our Major Pentatonic Exercises we can use a minor 3rd and flat 7 like you talk about and I’m doing this more-and-more..it sounds really great when played at the right time. I was curious if you ever use a flat 5 over the Major Pentatonic Exercises. When I look at the Minor Pentatonic scales, we have the 1,b3,4,5,b7 and 8 and I’ve seen by playing it how a flat 5 can be added here and it fits very nicely, but when I play it, it strikes me as the kind of note that you wouldn’t want to overuse too much in a Blues progression?