I haven't had trouble with mine negotiating the curves on my layout. I don't know the radii of the curves, but the coaches are fairly close coupled. I will also send an e-mail to athearn regarding undecorated Overlands. Even if they do one run of just coaches and combines and see how well that goes, I predict that it will sell pretty well. I don't presume to speak for everyone, but I myself would buy 3 -5 more coaches and combines as opposed to any more sleepers or parlor / business cars. - Edit - 07/10/06 Went to the LHS and bought a second Athearn coach. The distance between the end platforms when the cars are coupled is a little too far apart for my tastes. This can certainly be remedied if necessary and I for one am very pleased that they have been produced.