I recently acquired a Lionel Truman Car. How do I open this car to repair the lights? It seems to be sealed. Would also like to replace the bunting around the car as well. It is well faded in spots. Any idea where I could find some? I am going to put full interiors in as well. I really need to get the top off some how. I just discovered the pressure wheel in the truck is floppy and not making contact with the center rail.