yeah it's got that wye looking drawbar which i believe is a total design flaw.  Should have stayed with the regular drawbar like my 763.  lol.  They never run like the real thing.  I ran the NW 765 and it runs better than mine. lol. At any rate I widened my curves and checked some switches and it appears just the smallest of uneven rail needs to be very smooth.  Well I have success but only in one direction.  One day at a time I guess.

I have check the wiring and it seems to be out of the way of obstruction.  The tender and the locomotive are so close that you can actually see the both of them hit when it traverses a curve and then pop loose as it continues around the curve.  lol.

Guys I checked for foam everywhere on this locomotive.  what I believe is going on is the drawbar is not extending in curves or is getting hung up on the little notches its suppose to move thru in the curves.  Anyone got any further suggestions?  lol.  I'm going nutts.

Anyone I have just purchased a gorgeous NW 603.  I have a problem which needs some help.  The thing wont take a 22.5 degree curve without derailing the tender.  To me it seems that the design is either flawed or something else is going on but I can't figure it out.  It appears to me that the tender sits way to close to the Locomotive it's self when traversing curves.  Am I missing something that I should be doing to the Locomotive out of the box?