I have been using MDC box cars and hoppers with Bachman metal wheels for a long time and they have worked fine. Now, the platic trucks seem to always need to be tighten'ed. Anybody out there know of some metal trucks or better plastic one's out there?? /DesktopModules/NTForums/themes/mls/emoticons/whistling.gif I just had to use some of these new cool faces.