So Simple That A Child Could Remember It

Mustard Seed is perhaps more likely to be Mustard Powder, and it is likely Yellow (also called White in some countries).

DeepFried101 has also given the information on CHS separating the vegetables - specifically celery, onion and garlic( although I think more), steaming it and adding it to the marinade and flour. He also related making the extract out of the herbs and spices thereby making the herbs and spice mix super potent. All from first hand experience and historical accounts. In one of the threads, I wrote that separating the vegetables gave an opportunity to include more spices on the list.
Additionally, Smallgree has collected actual artifacts and disseminated it throughout until the recipe of 11 herbs and spices is no longer a secret. Only the fractions become the unknown.

As there are probably a hundred modern KFC recipes adapted among 147 countries, the emphasis indeed should be on recreating the Original KFC recipe.

Or perhaps, we should start a new thread- Recreating the modern KFC of each country: Kalonji in Australia, turmeric in India, cumin and water grass in Egypt.

The problem is that even CHS might have made a lot of alterations himself: from the historical accounts of DFN101 and interpretations Smallgree.

Silver, I would also add that you yourself has made a lot of revelations from your own work on the recipe from your own perspective with your background in chemistry.

At this point, To quote Smallgree, “ If you ain’t cooking, you ain’t lookin”.

Apparently you oppose "what if" scenarios.