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Hey Russ. the boiler project looks great. One thing to consider is that you don't want to allow the flame from the burner to hit the back wall of the combustion chamber, it will burn it out, and then overheat the end cast iron section causing it to fail. Another point to consider is that this is a cast iron sectional boiler. Opening the door only gives you access to the combustion chamber. To properly clean this boiler you must remove the side panel and the top panel and brush between the sections. Also the biggest enemy to this type boiler ( sectional cast iron ) is thermal shock, the return water entering the boiler should be above 130f, this is achieved by a continuous bypass of a small amount of the leaving boiler water back to the input of the boiler. This can be controlled automatically with a thermal mixing valve. I hope this is helpful.