The plow is a kitbash using a USA kitchen car as the starting point with an Aristo plow. It's weighted to 7lbs with San-Val ballbearing wheels in Aristo bettendorf trucks that have had the bolster glued in place. All the weight would tend to compress the springs and mess up coupler height. 7lbs seems to be about right,I played with the weight a little when I made the car a couple years ago. The headlight has a yelo-glow led , a resistor and a couple D cells with an on/off switch.