Hi all... Gotta problem I'de like to give to all the expert Gaugers. I recieved an older model, hand-painted Mantua GP-20 off E-Bay. For 20 bucks I couldn't go wrong! (Righhhht)....As always had steam power, I don't know squat about diesels. My only other one is a Walthers SW1 which I love. I put the Geep on the tracks. It hummed but didn't move. I cleaned up the filthy wheels and re-lubed. It hummed but didn't move again. Hmmmm I took out the power truck and inspected it. Aha! An itty bitty screw was stuck fast to the magnet. Removed the screw and tried to figure out where it came from. No luck...all parts seemed to be in order. There did not seem to be a screw missing anywhere . Checked all the wires and they seem to be fine. The only one I couldn't see is the wire where it attaches to the rear truck. Tried to figure out how to remove the rear truck. Couldn't get the shell off the chassis. The tabs wouldn't move! I didn't want to force it as my mini screwdriver was beginning to mar the plastic. Inspected the shell and saw that the light bulb was still in it's clip but don't know how to re-attach it to where it's supposed to be . But that seems to be a separate problem. Cleaned all the wheels again, re-assembled and set it on the tracks. This time it ran for about 12", stopped and hummed again The back wheels sparked a little and that was it. Now what? What's my next step? Off to the hobby shop? Or is there something else I should check or do? Thanks in advance for any suggestions. Matt--Hershey, Pa.