Recently purchased 3 and am experiencing a tracking problem.  When the loco and tender exit a curve to a straight section, the loco is skewed and the tender is straight.  Doesn't look good but runs ok.  We have tried 2 different layouts and different radius curves.  We think it has something to do with the type of drawbar, sort of like two Y's end to end. Any suggestions appreciated.
UPDATE: I removed Part # 00T01 from loco and part # 00T02 from tender (drawbar connection points) and removed the elbows in the slots completely with a hobby knife.  This has taken care of the allignment problem and the unit still runs on 18" radius.  We are happy with the results.