The Triquetra Knot is a relatively difficult design to finish, keeping in mind the 3D Printing parameters, trying to make a defined layer of the Knot, while maintaining a connected bulk for the extrusion material to build upon proved harder than it at first seemed. Converting from the original 3DS file to StereoLithography (STL) proved even more of a challenge, hence this is a FREE Model, simply because the export to 3DS left "Holes" in the object that only Re-Seal when the "Force 2 Sided" applicationis made. I'm keen to hear of any success or failure of this model by anyone testing it out.