This system

The Nanjing rules have been mentioned in some previous threads here and there. You can get an idea of the theory behind it by reading the account of one of those who worked on it: Shih-chuan Chen. It is based on some extant results of divination from a reputable source, of which Wikipedia says, "For many centuries, the Zuo zhuan was the primary text through which educated Chinese gained an understanding of their ancient history." In this text, the divination always results in a single line changing, and some other results from a related source show that even in cases of no lines or multiple lines changing, the diviner mentioned that they had received an "8" (a single line) for the reading. The rules are based on the same numeric theories behind the yarrow stalk method, which are mentioned in the Ten Wings. It shows how a single line may be derived, which can be any of 9,8,7 or 6, and which accounts for all the extant readings of the ancient diviners. If you are one of those who for some reason, and contrary to Hilary, find single line results of interest, this sounds like something worth looking into. This is a brief account, which doesn't go into the significance of the numeric theory, but in this respect is no less credible than the yarrow stalk method itself.

I really have nothing more to add, so if you want I can post this in Exploring Divination and link to it in my signature. As for five elements, the arguments against it can be refuted by the evidence of the Ten Wings as well. In other words, if for you the Ten Wings "are not the I-Ching" then the five elements won't be either. To debate this any further is a waste of everyones' time.