Today should be the last day I spend sealing the tanks. After mixing a batch of sealant, I got started by installing the fuel level sensor. I checked the output resistance before and after installing the sensor in the tank. The reading were the same in both cases. 
I applied a bead of sealant around the vent fitting.
I applied sealant to the access cover and installed the part on the tank. While installing each screw, I applied sealant under each screw head. 
The last thing I did was install the blind rivets on the aft end of the tank. I twirled each rivet in sealant before installing the parts in the hole.
