Afk77 09 The guide pivots in the slot and also holds the braids. The oil was used to soften the tires for racing and is occasionally used on the tracks and braids as well. Copper or steel braids (or braided wires) provide power to the car by making contact with the rails on the track. These tracks simulate off-road conditions by adding elements like cocoa powder or flour to give the look and feel off their slot car driving through dirt or snow. Namespace aliases like WP: or wp: instead of Wikipedia: are accepted. When additional power supplies are added, the powerbase -- the segment of track where the power supply attaches -- may need to be modified .