Scotty R
Blues Newbie
... Meanwhile here's a video I found interesting. There are many others on YouTube. https://youtu.be/F7vq8H80Crw
Agreed that the demo from RJ (above) is excellent. Here's another I liked where a guy is showing more of the heavier tones
https://www.youtube.com/watch?v=NMiQO4R3jIM&t=247s