Thanks to you both. It's not a problem with the track. It turns out that if I run it forward anti-clockwise it doesn't derail. Simply, one of the trucks isn't fully maneuverable...

I just got the Golden Spike set, and the EMD NW-2 switcher keeps derailing on curves. It's always the same truck that derails, and this truck doesn't turn as much as the other one.

Should I try and fix this myself, or contact Bachmann for a repair/replacement? (What a hassle...this shouldn't happen!)

Thanks

Thanks for your reply, brokemoto, yeah, I clearly need to get more track to be able use this set (beyond the reduced-size oval I have set up now!)

...there are 3 x 5" straights for one side of the oval, and 2 x 5" straights + a 6" turnout for the other...that is 15" on one side and 16" on the other! Plus, the siding is too small to fit an engine without the train crashing into it! Am I missing something?! The provided track does not seem to really make a coherent, properly aligned layout!

(Love everything else about it!)