To add to Woody's comment about the trailing truck, the idea of wrapping solder around the axle was passed on to me, also. For G1 cars, I use 1/8" dia. solid solder; 1/32" or so would be good for HO. A drop or two of CA adhesive holds the coil in place. Something very important--do not let the coil of solder contact the back of the wheels and bridge the wheel insulation, like I did once. Instant short!
Placing the weight on the axle, instead of the car body, eliminates any extra load on the truck bearings and lowers the center of gravity for better tracking, what I was able to accomplish with a string of 4-wheel dump cars
Larry
Placing the weight on the axle, instead of the car body, eliminates any extra load on the truck bearings and lowers the center of gravity for better tracking, what I was able to accomplish with a string of 4-wheel dump cars
Larry