Just received my atlas f3b unit. I made a train with my f3a and the first time around the b unit derailed.  After inspecting the b unit I discovered that one set of trucks did not have the turning ability of the other truck.  What I discovered is the brake cylinder lever hits the ladder.  I have started to trim back the lever to allow the unit to run without derailing. My smallest radius is O 63.  Has anyone else had similar problems?

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I would just remove the ladder before cutting up the detail parts. A picture of the issue?

Their information lists minimum diameter of:

  • Minimum diameter curve: O-36 (3-Rail) (A-unit)
  • Minimum diameter curve: O-45 (3-Rail) (B-unit) 

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