Next up was to knock off fuel tank related items so I could get to a spot where I could proseal the fuel senders and the fuel return ports onto the tank.
Then I needed to test out the sender to make sure it can go stop-to-stop without hitting anything inside the tank. Mostly the fuel vent line is what typically gets in the way. I measured the resistance at the stops on the bench to know what values I should see. I then used a string down through the drain opening to help me pull the float up and down in the tank. I had to bend the float towards the front of the tank to get it to not hit the vent line. After a couple of iterations, I declared success.
I then started on the fuel return port. The EFII instructions only require that you place the fuel return at least 3 inches away from the feed line to prevent bubbles from fuel being returned to the tank from being picked up and sent back into the feed line. After reviewing some posts on VAF, and seeing multiple other people put their fuel return lines in a spot that would interfere with attaching the tank and the wing to the main spar, I decided the best spot was just forward of the vent line port. Several others ended up with similar placement. Once the spot was decided, I had to drill a 0.5″ hole for the center AN fitting and surrounding holes for the screws which help prevent rotation of the bung.
I’ll let this sit for a while to cure, then it’ll be time to leak test the tank.
I was also able to enlarge the holes in the wing ribs to 3/4″ to accept conduit for my wire runs. I also added a second 7/16″ hole to run a second static line to my Pitot tube for its AOA function.