Don't know if anyone out there has been running their 6-29142 Canadian Pacific Skyline 500 Passenger Cars of late, or have ever had this problem. I was running them the other day behind my CP F3 A-B-B-A when I noticed a shadow in one of the windows. Upon opening it up, the upper seating section of the Vista Dome had left loose on one end and dropped down. This was the result of the tab that holds the seating section up to the roof having melted from the heat of the light bulb directly beneath it. This could have been prevented had the bulbs been installed about 1/2 inches further out on each end. This happened to me once before. My fix was to epoxy a washer over the tab to hold the seat section up. This time I also added aluminum foil to the bottom of the seat section to help dissipate the heat from the light bulbs. It would be interesting to know if anyone else has run into this problem.