I have an MTH 0-8-8-0 Angus #20-3439-1 that derails when running in reverse around my O72 curves. The frustrating thing is it only derails when the boiler swings to the firemans side. When running in reverse and the boiler swings to the engineers side everything is fine. This problem just started. When it was new, everything ran fine. I have checked everything I can think of for binding and obstructions. I have lubed all the joints that swivel and move. Has anyone ever had this happen or have any idea what is wrong? Thanks.
Ken