This one version is not yet the ultimate version but it is good enough to keep things moving for those who wish to understand the true nature of DaGua. The word XuanKong is purposely left out...
Liked any FengShui method, what makes it ticks is the underlying application and what is probably known as Mid-Heaven BaGua. Without knowing this it is as good as theory. The LuoPan only shows you the Heaven and Earth plate. It never tells you about application. If really that XKDG is about Heaven Qi, how do one link it to Earth and Human? There are three components. Heaven, Man and Earth Gua. You have the 2 without the 3rd, things cannot work consistently. It is really not about date selection, tilted door and matching to the person's Gua. It is more of arranging YinYang from the 2 slices, 4 imagery and the mysterious Mid-Heaven Gua. This is sort of the very reason why so many courses offered out there are plain rubbish.
If you Google and search for Mid-Heaven Gua, probably you will find one version called YuanBao BaGua. It is the same species someone dug out from DunHuang cave years ago... Is this the Mid-Heaven Gua applied to XKDG? Ha... you just can't trace over that into your LuoPan and simply use it? Strangely, you will also come to notice in a very near future, some masters may be teaching Mid-Heaven Gua in their XKDG syllabus.
So this very Mid-Heaven BaGua is a top secret of any given school. Should I disclose what do they advocate to make their XKDG works? Drop me a mail or comment if you want to find out.