One of the latest additions to my collection is my first flatcar. I ran it thIs past weekend. I had it hauling an 0-4-0 & tender. That worked fine. However, when I used a lighter dozer & loader load, the train... "string lined" (I believe is the term) in the U-shaped curves so I moved It back just In front of the caboose. I need ideas for a good "heavy enough" flatcar loads. Still, It needed more weight. What can I use to make a good, cheap, steel coil or some industrial equipment.