Loaded the stl into PrusaSlicer and it reported nearly 15000 open edges and over 15000 auto repairs. I have loaded the stl into Blender and copied the two necessary profiles from which I removed all unnecessary vertices. I then extruded the two profiles and created a union of the two extrusions which I then exported as an stl which loaded into PrusaSlicer with no errors found but can't figure out how to upload my stl