I've been a sifu on demand student for four plus years. Why am I still here? Because I have actually engaged the material and see how that it is effective and leads to real skill and understanding. I don't mean to sound condescending to anyone that decides to end their time here. However, if you have completed stage one and two but you haven't engaged the ongoing training then you are truly missing out. The training only deepens and widens your sense of your body and it's mechanism. Moving into the material that shows is the differentiation between the core and the shell is like starting all over again. It makes everything you've done up to that point make sense and you can see how that it is was leading to this deeper understanding for to Sifu Kelley's approach to teaching. He leads us along, each section building on the last. The feel of the shell is completely different that the feel of the pearls and the core. Each one is internal and based on feel but they are distinct. I made the huge mistake of assuming that since I had some understanding of the shell that it was all there is and that all other arts are actually trying to use the same thing. It's just not true. As I continue my training and my understanding increases, I look forward to the harmonizing of the whole system. Keep training! There is more to get to.