I did and it's awesome. I replaced my forward drum using the instructions in that book. Saved me the cost of having CK do it himself (which I guess is an unintended consequence of selling such a book ).
I did ultimately buy a new trans from CK, as did my brother, so I think he made out okay.
I have the book. I love the book. The only and I mean only thing I didn't like was the way it was bound. Info was great. Pix are great. I will be doing a trans overhaul eventually. This will give me the knowledge I need.