Hi Marc
I used a decal to create the circuit pattern. The trick was that it is very difficult to print silver on a decal as it just doesn't show up. The solution was to paint the area where the circuit goes in silver and print the reverse decal in black. Unfortunately I used a mac for the graphic and have since switched to PC. the file is saved in mac paint (.paint extension) format, so I can not open it to convert it to something usable. If you have a mac, I can get the graphic to you, otherwise you may need to design it or have someone do it for you.