Stuart Norton wrote:
You definitely should if you can.
I went to a gasshuku he held about a week and a half ago and it was pretty amazing.
He was so relaxed but created crazy amounts of power.
He was also a fantastic teacher, and willing to answer any questions we had, be they relevant or not.
I can't say enough good things about Robert Mustard Sensei. I maintain that he is the best teacher of anything that I have had in my life.
WRT posture, he emphasizes timing, balance and the relaxation of the shoulders and arms (relaxed, not limp) to create power with hip and legs.
At least...that's what I remember him focusing on. I hope that I am at last starting to understand what he was telling me when we were both at hombu. I use many (if not all) of the exercises he showed me/us to work on balance and power in my own classes.