Hi All, I've a Proto2K E8 I recently purchased from a friend that was damaged in shipping. I will need to replace the fuel tank since the tabs to hold the shell on were broken off. Where should I go to get this? Also, if running the loco backwards it holds to the track well, but running forward, often the very front wheel set leaves the track on one curve, sabotaging the rest of the run. The remaining four wheels hold well. All are in guage and appear fine. Advice - other than increase curve radius?