So I've installed the unit into an LGB caboose.......see photo. The unit shuts down after a couple minutes operating apparently due to overheating. The overheating may be caused by my design of the plastic exhaust tubes needed to accommodate the small diameter smoke stack. So, I may need to redesign the exhaust tube structure which I'm not sure how to do because at the top it will still need a small diameter tube to connect to the smoke stack. I tried various CV61 Fan Speed Standing settings, from low 0 to highest 100, and the higher speed helps but it still shuts down albiet operates longer over the low fan speed setting. Lowing the temperature on the heating element would probably help, but I don't see any CV settings for temperature control? Any suggestions would be appreciated.