Bachmann Spectrum N&W J Class 4-8-4 derailing problems

[nachoman]

Wow, looking at the photos,that seems to be one complicated drawbar! It looks like it isn't a simple pivot on either the loco or the tender. On locomotives that have a simpler drawbar (a piece of plastic with a hole at each end), if you have the screws too tight, the drawbar can't "twist" at the pivots allowing the locomotive and tender to track independently of one another. In other words, you need the locomotive and tender to be able to rock somewhat side to side independently to account for uneven trackwork especially on curves. Looking at this arrangement, I can see how the drawbar can pivot at each end to allow for the curve, but I don't see any provision that would allow for that "rocking" motion.