I bought a set of slag cars from another forum member not too long ago and I noticed that MTH doesn't seem to give the slag cars they manufacture a ready to run load to carry like their ore or coal hoppers. I have made custom loads for my DTE coal hoppers that did not come with a load using small cut down pieces of wood with some cement stain removing gravel-like stones that my dad uses around the garage (can't think of the name off the top of my head). I want to make my own custom slag car loads sometime in the future if possible but I'm not sure how to approach that idea or what to use.
What are your guys' takes on something like this??