I know a little...sorta. If you were going to have a problem you would have had it by now. I would continue running the bio and replace what breaks with items that are spec-ed for Bio. In Europe, all D must have a certain amt of Bio content and their diesel engines are built with that in mind. Also, they have Bio available at the pumps and some stations can mix any ration you wish at the pump.
The problem you should most likely face is "bad" fuel that has meth or water or glycerin content. You must have the process and testing down to a fine tune. You are my hero! Where are you and do you want to indulge in a coop? I have LOTS of oil.
Hello John, I built a Murphy's Machine, type that in google and Murphy's web site will come up. I do have it nailed down so far as making and testing the fuel prior to the fuel tank. It isn't hard you just have to know what is going on before you go into the tank with the fuel.
Where are you at in this world. I am west of Houston by about 50 miles. If your close maybe we can hook up and talk BD over a strong cup of coffee. I have about 500 gallons I need to get after but I have just been too busy. Today I laid out hte plans for a new addition to the barn so I can keep the bus inside instead of in the driveway. Anyhow contact me and we can see what you got.
Now so far as the o-rings I believe yall are correct. I would rather take the pump in and have a rebuild now than to do it on the road. There can't be a bigger pain in the toe than a roadside fix.