Horse halter with fiador knot

[spud wrench]

I would like to make some horse halters using the fiador knot. There are several web sites that show the procedure but the instructions and illustrations are difficult to understand and follow.
I am used to the very good instructions and illustrations in "The Complete Rigger's Apprentice". I would like to get instructions of that quality for my project. Do anyone know where I can find them?

Thank you.