The Jiu Jitsu black belt and fabulous artist Seymour Yang, known online as Meerkatsu, wrote up a seminar by John he attended in Leicester, U.K. A number of comprehensive videos are included.
It is interesting to see how first time seminar attendees find John, considering he was the person who introduced me to Jiu Jitsu about 20 years ago.
SWEET SPOTS AND DRAWING DOTS: JOHN B WILL SEMINAR AT LEICESTER SHOOTFIGHTERS
He has original artwork and custom fightwear available on his site: