I bought this N&W vista dome from a good person a few years ago. When I opened it up, I saw that the roof had the small indents you can see in the picture where the four lights in the vista dome are located. this is a rail king and the guy who owned it ran DCS (hence 18 volts all the time) and apparently MTH forgot to install the aluminum heat shields. Hence what you see- they are about 1/2 inch across. Back then, I contacted MTH and they were very helpful- I thought it might have the wrong bulbs- and they sent me the heat shields to install. I added some aluminum foil for good measure and one day will convert to LED.
Back to the point, I was running it the last night and wondered if something (like a roof ventilator or something that looks like it belongs) is out there to simply put over these indents. I looked at several suppliers for building items (like Tichy) but no luck. Thanks for any suggestions!