Auxiliary Diesel Tank Gravity Feed vs. Electronic pump

I, too, run all the diesel used by my F250 through the 91 gallon RDS tank in the bed. When I'm ready to get more fuel from a station, I top off the Ford's tanks and then I pump more fuel from the station into the auxiliary tank. Doing this allows me to filter all the fuel going into the Ford's tanks, so they stay cleaner and so does the factory fuel filter which has an easier job assuring the engine never gets bad fuel.