You're right. If this is your first time there's no way you can do this in 30 minutes. I have removed almost 10 of these with this method and I have both an electric side socket impact and a regular battery drill impact. When you remove a lot of these, you know what socket sizes are what just by looking at the bolts (and most by memory). That's how it only takes me 30 minutes. Admittedly, I use the more dangerous method I mentioned at the end more than I'd like to admit. I like your way too, though usually there's too much demand for the crane to borrow it this long. Thanks for the input! I'm sure that will help someone!