I have a Bachmann Spectrum Class J 4-8-4 steam locomotive. The conection between the locomotive and tender is a pernamently attached piece of plastic(has screws to take it off, but you can see its harder than others to take apart). This plastic bar makes the steam engine very unflexible. If the track even has a slight bump in it, the front of the tender will raise up when the back of the locomotive goes over the bump and 9 times out of 10 the front wheels come back down and derail. Is there anyway to replace this connection so its more flexible. Thanks