The first type of boxcar I built was the older style where the handbrake wheel is mounted horizontally above the roof line. In order to maximize the number of boxcars, I decided to cheat and put a different railroad line and specs on each side of a single car. This scheme only breaks down when looking at the end of a single car where you see the two different numbers. However once the two cars are connected together and their ends are somewhat obscured I now have two boxcars for the price of one model.