Its not luck alan_k its skill, is teaching someone and learning someone not the same, bit petty!!! i appreciate your educated opinion? school teacher by chance, or a subscriber to Grammarly, so i take it as no there is no certification to becoming an instructor, just a case of having the student follow a syllabus, in an organised and responsible manner, as i did myself all those years ago https://www.youtube.com/watch?v=b9Su21g-tck this guy does it for free, maybe we should put something back, teaching my buddies in the appropriate way, safely under supervision of an experienced individual can only be a good thing,? ( no different to an instructor )