So, I've been working in AutoCAD for the last 13+ years, and Sketchup for 3D work for ~the last 8 years. I've got a few hundred components I've built in AutoCAD over that time and I'm recently more interested in getting those designs CAM ready, so I shifted over to Fusion 360. There was a mild learning curve but I've gotten pretty far in 360, as far as being able to do most things. My current frustration is that all of my polyline segments show up when I extrude my surfaces. That's not a big deal because they're only visible with edges enabled but when I go to fillet or chamfer my edges, it wants to prioritize the polylines as part of the face and it'll send an error because it's basically trying to follow the shape of the guitar AND the polylines on the opposite axis. Ideally, I'd like the shape of my outlines to extrude with no polyline segments visible on the sides (like one solid piece). I started using 'boundary' , 'join' and 'pedit' commands and others to merge the polylines before I dump to Fusion 360 but the segments still remain visible. I've tried merging the faces in patch but they don't appear to do anything...? Any ideas? Pic below for reference.