I have several sprung LGB R3 radius switch tracks (turnouts) on my railway. 99% of the time all of my rolling stock passes through them without issue. All of my rolling stock has metal wheels and added weight. Recently I purchased a few LGB Toytrain freight cars. Metal wheels and weight were added. For some reason these cars are giving me a bit of a headache on one of my sprung turnouts.
I checked the spring and cleaned any debris from under the moving points. It’s odd that this should happen. All of my other rolling stock is either of the LGB field railway type or LGB full size freight and passenger cars.
I will say that my USA Trains Overton passenger cars give me the least trouble of any piece of rolling stock I have.