You are welcome! I am glad I could help a bit. While you have the wood burning tool out... try burning a design on some leather... just make sure it's not chrome tanned stuff. You can actually remove material and it ends up looking carved. Just char.... then scrape with your modeling tool. repeat if necessary. Katsass, a member here, makes his own brands from coat hangers and he heats them with a torch. If you can bend a wire into a logo shape that might work too.
Another thing you can try is jeweler's stamps, they can come really small. But a set of letters can run you a $50 or so.