For me the ony cost-effective way is to buy a donor.
That way, all the bits and pieces are there. What's left
to fabricate isn't so bad. But yeah, I'd like to do it. I
still have a VW Jetta diesel sedan a buddy traded me.
So I can use the biodiesel for something grocery-getter
size, and tweak the process in the meantime. Stick around.
This might catch on.