Ian wrote:question - is the grab down movement arm-only? I don't see any waist or dantian involved.
If he support his movement from his dan tian, only he can tell. But I think he does. You don't need to see any waist movement. You don't even need to drive your movement with your waist or dantian. If you can support your movement just at impact, it's quite enough in order to use "dan tian movement" or "qi". The visible is always mingjin, or evident force.
Jose: sorry, maybe I am just plain stupid, but why do you call it "old school piquan"? 'cause of his old age?