Installed the AOA port in the lower wing. Since both of the ports' mounting bolts didn't flush well and pulled the skin in a little dish, I decided I would try and see how the epoxy putty worked on the skin. I mixed up a small batch and filled the four bolt heads. I'll wait till it hardens to fair it. I fitted the fuel sender units. It was really hard to fit them exactly since there was no way to see inside the tank to check the travel of the float. I rigged up a jig to hold the sender so I could see it. Cleaned and sealed the cover plates and the sender units for the fuel tank covers. I used ProSeal together with the gaskets.