Thanks Guys I appriciate the help. Ok I got one of the gondolas working, but the other is asking to be flinged across the room against the wall. Ok i took both of their under bodies off, inspected the wheels and put them back together. I even got a close up look at the track and nothing appears to be out of sort. Well, one of the gondola's works now. I must have gotten the screw in just right, but who knows. The other just wants to jump any curved track. These are just the basic gondola. I can't recall the specific lengths for the average gondola (real car), but I will assume its suppose to be 45 foot long. I have other cars that are longer(cover hoppers) and they run through my curves with no problems. Fun Fun, Thanks again