remember Charles Atlas ? there was another Dr shing taught what became known as shaolin kung foo , i did both well before i saw the inside of a school
moved to the city and realised it was real enough if you practise , yes i needed a lot of correction when i hit the military but was made a instructor in my 4th year
so self education from books and DVD's i think is like a good ryu you get out what you put in
and david kahn is no amatuer , he's impressive in person
i'm also very glad this series is his own and not with Levine who was light on substance and heavy on marketing ( and posing , sorry for his fans , met the guy so entitled to my thoughts and yes he;d wipe the floor with me , eventually

)
i may invest in a set myself
cheers for the link Terry !