Dan, There are lots of options and I am sure you will get advice from more than one source. I have two wing tanks and one header tank with two Facet pumps one for each wing tank. We incorporated some hard wired logic in my alternating controls of the pumps. The wiring diagram is at http://krron.freeyellow.com/ . You can eliminate the auto feature and go manual with indicating lights and modify the diagram.
KRRon
