Is there a way to open NC data within solidworks and edit the part ?
I have attached one of the parts.
NC files (toolpaths) are slices through the part at specific increments. You could get the toolpaths converted to reference model as triangulated surface/mesh, or 3D sketches. Either way, you would have to rebuild the model yourself and you would have to compensate for any tool offsets that were applied.
Retrieving data ...