i likw that 3 axel crane... fits it nicely.
At the club we have some of those ingot cars....just for fun I took one of the cars less the mold, and pushed it to see how far it would roll. the thing is heavy for its size and the CG is very low, wheels rotate so smooth that we could get it to roll for 2 scale miles. passing the speed-o-meter at 200 scale MPH LOL...