This photo shows the complete burner and superheater as they are mounted beneath the boiler.  Above the burner grate is the vaporizer coil and then the superheater coil.  There is approximately 18’ feet of pipe coiled around the inside of the burner.  In the background is the original smokebox that fits on the top of the boiler.  At this point of the restoration the original boiler was still believed to be serviceable and thus replacement of the smokebox had not been planned.  When the boiler was found to need replacement, modifications of the smokebox would have been required.  It then became simpler to replace the smokebox than change it.