Waste Oil Heater Forum - Your definitive source for burning waste oil for heat.

I'm a drip burner fan because I like being able to heat off-grid. This will be my 3rd year on what started as a Sanders conical. Sanders' goal was easy cleaning and he accomplished that but I just could not get what I considered a clean burning heater with it. I studied Spikes burner which I think is probably very efficient and clean and came up with some modifications to the conical that turned out to be a big improvement in efficiency and cleanliness both on the burner and out the stack.
Do any of you drip guys experiment with different types of burners? I like what I have so far but I think it could always get better. What do do you guys think? Can you make a drip heater burn clean?