Kls flat car

My 1:45 model of a Kls flat car, as used by Railpro in the Netherlands (among other companies and places). These cars are often loaded with sleepers or rail pieces. I tried to design a smaller sleeper that would fit the loading space, but I failed and went for rail pieces instead. It looks good I think, and it's less parts intensive. I haven't made a proper running test yet, but since this is my first MOC since my Tyrrell F1 car (and still not sure about a detail...) I decided to upload it anyway.