I'd like to save/export the surfaces only, no line work, in 3dm format. How do I do that, without having to select the 100's of surfaces, while avoiding the lines? KWIM?
You can set up a shorcut key to select all visible surfaces or download and install a custom command Select Objects By Type - http://kyticka.webzdarma.cz/3d/moi/#SelectByType - then export those selected objects to the new file.