I've been experiencing technical issues so this was all I could work with at the moment. I'm also having trouble creating openings using extrude/boolean difference method but hope to figure it out soon. Share this:FacebookTwitterEmailPinterestLinkedInEXERCISE-218 YITONG DUAssignment 203 Comments (0) Join the discussion, leave a reply! Cancel comment Comment Name Email Website Notify me of follow-up comments by email. Notify me of new posts by email. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.