I don't know if people are familiar with this approach, but it was all the rage when I was cutting my teeth on the piano repertoire as a student in Manchester in the 1960s.Here are the main principles:1. When practicing a difficult passage, play slowly, legato, hands separately. Repeat until comfortable, aiming for complete control over the quality of tone. 2. As the passage becomes more controlled, play it once more, but this time in a ragtime rhythm.3. Go back to 1, this time playing pianissimo. 4. Go back to 2, this time playing the ragtime rhythm pianissimo.5. Go back to 1, this time forte6. Go back to 2, this time forte7. #1, non-legato, pianissimo8. #2, non-legato, pianissimo, ragtime9. #1, non-legato, forte. 10.#2, non-legato, forte, ragtime. 11. Finish with a fortissimo ragtime, albeit this time in a rounded portato. This method of Prof. Stanley McChoughin and Dr. Vasely Dinsmore proved indispensable for the development of my virtuoso piano technique. Has anyone else benefited from this method?