The powerpoints and sample files for our SolidWorks World sessions on rebuild errors & on surfacing (tutorial for folks who don't think they use/need surfacing) are on our website: [URL="http://www.dimontegroup.com"]www.dimontegroup.com[/URL] Please try to download after 5:00 PM/before 8:00 AM U.S. central time. If you went to SolidWorks world, you will be getting a CD containing presentations in the mail in a couple of weeks. However, the powerpoint and sample files for the rebuild error session are out of date on the CD - I spent about four hours over the weekend expanding on the powerpoint. notes for the rebuild error session and adding coments into the parts. I did not, however, have anything to add to surfacing for blockheads (nor did I do much better on spelling). Curvy Stuff 301 is due in a couple of days - it is done, annotated, and just waiting for the guy who handles our website to get it up. Stay tuned...