Trouble shooting a freight car

Jared Harper
 

At the Collinsville RPM meet I "won" a Rapido NP Pre-War USRA DS box car.  It is a beautiful model except for one thing, it lists to one side.  I am not so great at troubleshooting freight car problems.  Do any of you have a suggestion as to how I should correct this list.?

Jared Harper
Athens, GA

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