chrisd,

The SolidWorks file can be opened on other computers without the plugin. It preserves the surface quality (XNurbs generates native CAD surfaces, i.e., trimmed NURBS surfaces. So you can also save it in other formats, e.g., IGES, and it also preserves the surface quality.) To edit the XNurbs features, you will need to install the plugin. If you just need to use the plugin for a short time, then you can install a trial version, which is fully functioned.

The attached files are SolidWorks files with XNurbs features. You need SolidWorks 2017 SP4.1 or later to open the files. Just let me know if you have any problem.

Kevin