Ya I agree with what many of you have said. To me, it's not an issue of whether the system is complete or not or whether it is more or less efficient. It's more along the lines of getting the body used to moving that way - get used to throwing a hooking punch or a roundhouse kick for example. I believe that once u stick to the formalities of wing chun chi sao, chain punches, stepping, etc then a hook punching or even a jab could feel as foreign as bong sao once did. I don't think it should feel unnatural - if the opportunity for a jab presents itself,over the standard vertical chain punch, why not take it? If so, why not know how to throw a good one?