This is absolutely fantastic. I watched your video and was intrigued by the tool you were using. I have tried wood burning before with a simple wood burning iron from a hobby store, but I found it difficult to use accurately. Your tool has two prongs or something. Where can I get more information about the tool you used?
I think only about three. I had a triangular shaped pointed one with a flat bottom for the small details, a medium sized longer rounded flat tip with a sharp edge for the other details, and the biggest (a little over 1/4 inch wide) shader tip for the black which took a while and it's no as easy as it looks. I think that's about it.