Anyone else make their own rail maintenance cars using epoxy, roofing nails and masonite. I cut a square out on the bottom of the car and epoxy a small weight to the masonite. When they get dirty I just hit them light with sandpaper. I usually run 2 of these together with freight. I like to use the 50' cars with the metal bottom for track maintenance. As you can see in the pic they work great. I paint the side of the masonite black and it can't be seen as well. Cool stuff!!!!