I brew my own Bio and just got a 55 gallon replacement tank form AeroTank for my 02 F250 7.3. I want to do the "Hutch mod" when I change the tanks over, but I am concerned about the compression union fittings that I see most folks are using. They look to be made out of copper or brass. I have read that copper and brass are not compatible with biodiesel. What are your thoughts? Anyone running B100 with a Hutch mod?

Thanks