Outline Tracer Remix

I modified it to take at least the type of pen that is shown in the picture. The pencil I am sure is fine but I thought a pen would be a better choice since you don't have to adjust it very every time it wears down. The channel is 10.8 mm to suit the pen. Included 123D file and Meshmixer for the clamp which isn't perfect but works. For some reason 123D design crashed when I tried to modify it. Plus of course the STL files. Enjoy!!