RAF-- I could say the same as you, my perspective on stance training maybe unique to my experience. I have yet to meet a stance worker who had good jin skills, so if your in SF let me know and we can get together and play.
Count-- How is it possible to move my Dan Tien without moving my hips and buttocks? Lot's of practice. Right know I'm sitting in a chair and rotating my dantien. It should be pointed out that this simple to show how much I can articulate my center. When I practice I would use my legs to amplify the power. That being said I would consider moving the Dantien without moving the hips an essential to being able to generate and direct jin. If you must use your hips to move your dantien you will end up breaking the exrternal harmonies. I doubt I can convince you through this forum, so I suggest if you're in frisco let me know and I'll show you it can be done.
--josh
Do not attempt to share your interest in martial arts with pedantic,
narrow-minded scholars. As soon as they find out, they will quote from
the
classics and regale you with all kinds of irrelevant non-sense. This in
infuriating. You can deal with this by either avoiding them or keeping
your
art secret.
--Ch'ang Nai-chou