mike g. posted:If it was me I would try a set of Kadee couplers and see how that goes. Before I would get rid of the cars!
The couplers are not the problem. Atlas made a scale car, riding low on the trucks like the prototype and they included the center sill and underbody details. The trucks themselves cannot swing enough to take sharp curves. I can coax my H21's around an 044 curve but the wheel flanges rub on the car bottom the whole way. If you want a 4-bay hopper to go around sharp curves, you'll need one that rides higher on the trucks and/or has some missing frame details (like K-Line, MTH or Lionel 4-bay hoppers).
