For a model railroading table that I was building for a friend, I needed to be able to cut a sheet of plywood at a particular angle. If you have a portable circular saw and a very long straight-edge, all you would have to do is clamp it to the sheet of plywood, and run the circular saw against the straight-edge. I don't have a very long straight-edge, nor do I have a circular saw, but I do have a table saw! Even if I had a circular saw, I am not that impressed with their blades, so I would still have used the table saw to get a nice smooth edge. This angled edge will be the front of the layout. I got the idea for the jig from one in the book "The Home Cabinetmaker" by Monte Burch (Sterling Publishing Co., Inc. ISBN 0-8069-6518-5). The chapter on how to make legs for chairs covers a smaller version of the jig. The jig was made from left-over pieces of wood found in the garage. It consists of a full-length 2x4 stud that rides up against the table saw fence. A triangle of 2-inch wide poplar boards was created by simply screwing the pieces together. Finally, a piece of wood was screwed to the end (the front board in the photo) to help push the board through the blade. One side of the board needed to be 30-inches wide and the other side needed to be 20 inches wide. Before I made the cut, I trimmed the full 4x8 sheet down to 30-inches wide. This made it more manageable when using the jig. When setting the fence, be sure to account for the width of the jig, in my case the 2x4 stud. This jig, which took about an hour and a half to construct, helped me make the cut accurately in less than a minute!