I made a crosscut sled out of 3/4" Baltic Birch Ply. It measures 28 inches front to back and 30 inches side to side with 19 inches to the left of the cut line and 11 inches to the right of the cut line. I have seen sleds with cut-outs or profiled sides which I'm assuming are to decrease the weight of the sled. Which part of the sled are these cutouts and profiles usually made on? I would like to do this to decrease the weight of my sled. No problem using it but it is a little unwieldy when I have to take it off to store it.