I am new to model railroading and am having trouble keeping my train on the track. It seems that my coal car is the culprit. It seems to leave the track first. Is there any way to adjust the track pressure on the car? I am puzzled because this train is for ages 12 and up and I am much older than that. The track is layed out on a 4 x 8 table on a solid 1 inch styrofoam base.