I know you guys already know about slow practice, that's the way this style of wing chung works. But try explaining how it's beneficial to other martial artists. Musicians know about it, and I am one so use it all the time, but just thought of a good metaphor so more people get the concept. It's like If someone is doing a piece of artwork on a confuser, and zoom way in to do alter something really small in the picture. When zooming back out it looks perfect. Try working on something tiny without that facility.