Yes Wayne, I remember. And he published some formulas as I did from old memory. He may have used some of my ideas as well. IDK. But, nevertheless, this work is no harder than mixing a developer. It is knowing how much of what to use. And the chemicals are not too exotic. There is KI, Sulfamic Acid (drain cleaner), Sulfuric Acid (battery acid), KBr, and a few other odds and ends. Then there is the catalyst, which must be one of several choices and this is the critical chemical. These can be bought just like Metol or HQ from chemical suppliers once you know what to buy.
PE