How to find original id of the dwg object

Hi, I would like to use dwg file as a kind of reference for creating geometry in Rhino. User can select curves originally created in autocad and add some properties (UserStrings) to them.

After modifying the original dwg in autocad I would like to re-import the file to Rhino while keeping all the UserStrings whenever possible.

Is there a way to somehow match Rhino and autocad object Ids?

Hi Max,

Try adding extended entity data to your AutoCAD objects.

ā€“ Dale