The file addit_3d_autocad.zip is not to scale. Can this be fixed?

Thanks for the feedback. You can scale 3d Autocad model by following steps on this page > https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-E96829D6-A58A-48B6-8B65-A7C99C879262-htm.html