I added a little weight (approximately 650lbs) to my 3pt. disk. The two pieces of chain are attached to a piece of rebar, in the middle, that runs the entire length of the concrete. The treated 2 x 10 was the bottom of the form used to pour the concrete and has been left in place to serve as a buffer between the concrete surface of the weight and the metal surface of the disk frame. I've used two tiedown straps to secure it to the disk and things seem to work GREAT.