Anyone use them? If so, do you have any advice on what works best and what doesn't? Any pictures would be great. I just took a couple pieces of extra plywood and shot a bunch of 8 penny nails through the back of them and screwed the boards to my front door and window that is low to the ground. All the upper windows that were above eye level I left alone. I hope I did it right because I probably won't get a chance to make it back to my cabin until snow machine season.