My wife and I have been renovating an old house for some time now and cut up a lot of plywood and paneling. The biggest problem is supporting the material while cutting with a circular saw. Yesterday while covering a closet with thin chipboard cedar I took a couple of hay bales and laid the stuff on them and used them as a sacrificial saw horse. They held the material securely and all I had to do was make sure I cut to my lines. This has surely been done before but I am passing it on.