AFAIK this is the original way to tie them. Good cleaning, stacking and above all sizing of the deer hair is critical for the end result. And a small mistake in step 3 can result in a very short or overly long wing in later steps, which you cannot change unless you start all over again. So a lot of folks devised different ways to tie them. For instance, by tying in Wulff style wings and subsequently making the hump from a separate bunch of deer hair. But this is kind of cool and it's fast and efficient, so that's why I shared it. These pix have been used for an article with explanatory notes, which will be published in April.
Mart