[Christ]

Sounds like a plan!

I tried looking at our waste oil heater (not the one I mentioned before) in the garage to see how that was setup to move the oil from the pre-heater and burn it, but I can't easily get into the firebox to see anything significant, or of use to us here.

It seems, though, that it transfers the oil from the preheater into a spray bar which atomizes the fuel over a puddle flame (there'll always be a puddle in the bottom to maintain the flame for "idle" periods). I can't be sure about it, that's just how my brain put together the limited view I had of it.