That is good advice and it definitely shows. Your left hand technique while chording inside the 5th-7th fret area of the board makes the kind of moves that put a lot of stress on my hand look so easy and natural
Mark, I'm always amazed at how calm and relaxed you seem while play so precisely so fast
Relaxing is actually the key to playing fast. Precision comes with practice. I spent a long time figuring out the best ergonomics for my playing style.