Hope you won't mind me saying as I'm a beginner too but I found the dvd which is free to view on the American site -- utah biodiesel who are suppliers -in a big way I think -he shows you all that's interesting in quite a clear manner & they are mass producers apparently. I thought it was nice to see it happening as is so to speak. When I saw the state of his mucky oil he was processing it made me feel better...... best regards all Mick