Began looking at the Fuel Senders and the cover plates for each fuel tank. Began by checking the resistance of each sender to confirm that they are within range. In the empty position the resistance should be about 240 ohms. In the full position the resistance should be about 30 ohms. Each sender was within a few ohms of expected. Also realized for the Fuel Return line that I need the 5/16 bulkhead fittings with a 45 degree bend rather than straight through. Another order to Aircraft Spruce... (Pictures aren't too good)