Celtic design curtain tieback made for my MY4777 open source 3D printing class. I got lucky and found an stl of the knot that I have a tattoo of at: http://www.thingiverse.com/thing:459232 I combined that with a curtain cleat found at: http://www.thingiverse.com/thing:291655 With these two I was able to create the finished product using both Blender and Cura.