I saw this in Wood Magazine issue 139. It looked interesting as I do a lot of assembly on my bench top. Also many times I need to lift up the cabinet onto 4x4s so as to get room for my clamps on both sides of the cabinet at the same time. It only took a couple of hours to build and it will be a very usefull item in the shop.
You can clamp in many different spots on the risers, I made mine the same size as my bench so as to be able to clamp them easly to my bench top.
It is easy to use square ups in the corners as well.
The artical called for useing lengths of plywood for the spacers, I chose to use up a lot of scrap plywood instead, gets ride of a lot of small pieces and does not change the way they work.