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I have an Athearn Genesis SD75M that derails one axle when it hits a tight curve in a tunnel (arrgghh!). It only does this in one direction. <br />All my other Athearn trains (older U28 and U33, and two "newer" C-44-9W) do not have this problem. It seems that they have more lateral play (ie: are "looser"). How do I loosen the trucks? <br /> <br />Otherwise, it runs great -- VERY smooth, lighting is fantastic and the acceleration is excellent. <br />
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