Graham is a brilliant guy, and a real innovator, so don't misunderstand what I am about to say.
His methods are fairly complex, and if you work with oil that hot, keep in mind that is well over the boiling point of methanol.
He uses those extra complications and the associated risk, to reduce the use of methanol and to reduce the release of methanol to the atmosphere.
These are worthy goals. However...
If you want to be a researcher and push the envelope, keep going, he's onto something.
If you want to make biodiesel to run your car or heat your house, there are easier ways.
If you want a little bigger viewpoint, this is the best discussion group on the planet for home brew biodiesel:
http://biodiesel.infopop.cc/6/ubb.x?a=cfrm&s=447609751Most of Graham's work has been posted and discussed there. So have a lot of other methods.
For a counter example, I have been making biodiesel since 2003 (I think...) and I process oil at 135F-140F, then recover my excess methanol from the byproduct in a separate step using a simple still, outside. I also wash/purify my biodiesel with water, which he is not a fan of. But it's very effective, and very easy, and very cheap. I don't think I am wasting or losing a lot of methanol.
My processor is a 55 gal drum and a $40 "water" pump from harbor freight. Still using the same pump after six years. I make 30-40 gallons every 2-3 weeks. Car has 120,000 miles, and 90+% of that on 100% biodiesel. And I heat my house with it, and my shop, and my truck, tractor, built a co-generator Lister, etc.
HTH,
troy