A friend asked me to make some coal and gravel loads for the new Walthers HO 2 bay hoppers. Since the slope sheets start at the top, I had to taper the ends of the base, in this case, 1/8" structo-glass fiberglass wall panel material. I made two test loads, one coal and one gravel to determine the correct length so the load looks appropriate. I started with 4 1/4" long strips, and made a sample load of each material. I will lengthen the base for the coal load, but since the gravel is heavier then coal, I will keep the base shorter. Here are some pics of the gravel load.