With incredible relief, I passed on my 2nd try today.  Such a burden lifted.  I was in shock when I saw the Congratulations screen, I was so worried I might fail again.  I needed every minute of the 4 hours, no breaks.  One thing that really helped is to do the first pass and marking anything you are not 100% sure of (which seemed like a ton!), and then going back through again to review the Marked and Incomplete ones.  This technique really helped then catch things I'd missed the first time.