One thing about these Rapido cars that could be corrected is the incorrect ride height. They ride high on the trucks. This was the same problem with the NP cars. I had to make a jig and sand down the excess bolster material to bring down the car to ride at the right height.
A possible solution: Make the cars with the correct bolster ride height and add a fitted washer to deliver the cars. The toy train types will be happy and more discerning modelers can remove the washer to bring down the car to the right height.
A video from the Pacific Great Eastern of a GN USRA being righted after a wreck. From the mid-fifties.