Gerald,
I knew you would conquer it in short order. Probably a love hate relationship is in store for your future....
Common problems that could come next....
1. Intermittent burner igniting. The ignition transformer has an inverter circuit built into it because it runs on 12v and needs AC to step up the voltage. If it does not fire perfectly, with the arc jumping the gap when the inverter circuit first sees voltage, it will most likely not fire after that until voltage drops and the circuit is re-energized. May fire perfectly 50 times in a row and 51 fails etc. It can be an intermittent nightmare to diagnose, but you can see this issue on a bench with a 12V battery, putting 100 start up cycles on it without a miss using your burner electrodes.
2. Next is the burner shuts down but the burner blower will not quit unless you drop all 12V power to the unit. The relay in the silver box that controls the burner blower circuit causes this. It has dropped the voltage down signaling blower shut down, but the relay contacts do not release given the springs have aged....very fussy old school design. Only fix is to replace the unit. The relays are not available, and as you know all these burner parts are pricey.
3. Less problematic is a cadmium sulfide burner ignition monitor. It is a photocell that is in a safety circuit and if the cell does not see the flame, for a predetermined time, it shuts the burner down. That has to be in position and clean to see the flame. These are glass covered and are known to crack.
4. The button thermostats, that are against the boiler front face, they control the burner and the 120V heating element. They have contacts that arc and erode over time. The 120V heating element ones handle a lot of current and are more problematic then the burner ones. I had one fail on the road. They are inexpensive and changing the ones that "make" to turn things on would be a good thing to do preventatively. The ones that are overtemp safety thermostats, do not normally see make and break cycles and will last much longer.
If you do not run into any of these issues in the short term, you should be good to go if you can keep the unit leak free....that is another whole story.
Good luck with the new coach, it is beautiful.
Later Ed