Michael, the source is not MoI... Its a 3d slicer definition I made in GH. The output is very clean cause I extract the edges of a plane and there is no duplicated lines in there. I managed to slice a volume, make holes in the slices, orient the pieces, extract the curves and tag every part but I ordered the final pieces putting them in bounding boxes one next to each other... And if two adjacent pieces shares and edge obviusly that line will be duplicated and the laser will cut twice the same edge. I couldnt find any way to do it in GH but i thought i saw something here but I think I was wrong. Thanks any way!