Just kidding! You tried going to http://www.the2012theories.com/craftsman-lawn-mower-blades/direct-craftsman-lawn-mower-parts-home-depot-blades-42-inch-will-not-engage/
, which doesn't exist, so that means I probably broke something.
The following is a list of the latest posts from the blog. Maybe it will help you find what you're looking for.