Tungsten is superior to lead in the counterweights

The density of tungsten is about 1.8 times than lead, which means that the tungsten is the size of lead about half of the same quality.
Pine car is so small, it is important to place the exact location, you need to determine its weight. Single tungsten cylinder at the top (0.5 oz) weight close to the bottom of the three zinc cyclinders (0.75 ounces) is the same as when your car is designed to give you more space, because you can be placed in a small area of ​​high weight, more precise with weights.