I am new to this forum, new to model railroading.  I just received a 4-8-2 heavy mountain loco (new) and I have a couple of questions.  First, the coupler on the tender is too low with respect to the couplers on the cars, (Atlas) so that when the loco starts up a hill, the car uncouples.  Is there any way to remedy this?  Second, the black wires between the loco and tender are stipped of most of the insulation.  Should I replace the insulation or send it to Bachman?  Is 5 weeks really a normal turn around time?  This is my only real loco and I am still building the layout and need it to test my track alignment etc.  And lastly, the front truck (pilot wheels?) seems to derail for no apparent reason, mostly on curves, eve gentle ones.  Seems like they are too light or don't have any downward tension.  Should there be a spring in there?  Okay that was more than two questions,  Told you I was new.  Stan