Exporting dxf. for Waterjet

Hey ya’ll! I’m having trouble exporting a usable dxf. for a water jet. This is the path the waterjet is currently taking. I need it to run along just the outside edge.

Can you show us a picture of how that looks like in Sketchup or better: share the Sketchup of that part? Looks like the part has a surface with hidden lines.

We have a waterjet machine as well (OMAX) but do most of our actual production preparation with AutoCAD or SolidWorks, as you will have the hardest of times to get real roundish linework out of Sketchup if this was a 3D Object.