CX-1 seems like a good system. The other way to make diesel, like what i think most people do, uses something to heat the oil, and u add some kind of alcohal as well as a filter. The alcohal is what makes biodiesel at the pump not compatible with some engines. (only OLD engines)
Alcohal is a solvent and eats plastic. Newer vehicles don't need to worry but older ones might have a problem with the lines that carry fuel. They are eaten from the inside out. At least thats is what i've heard.
Why do they add alcohal u ask? To increase the BTU's