I learned a lot just to play along with his records and try and find out what he was doing. Clapton btw. did the same, six to ten hours a day in John Mayalls flat. That's why I in commparison didn't get far with my quarter to half hour every two-three days.
I never knew (that this was the original) ...
Again one of those superb and highly individual selfies. I always wonder how you manage to get the point of absolute sharpness fixed when you don't see yourself in the viewfinder and how precisely you control the out-of focus ranges.