Mixed up second batch of tank sealant and assembled, sealed and riveted both the F-1204B flange to the top skin of the tank as well as the aft bulkhead. Also attached the bracket at the back of the tank that is attached to the tailcone bulkhead.
Unfortunately while attempting to bend the float arm for the fuel sensor, I complete misread the instructions and for some cracy reason I cut what I thought was unnecessary wire from the arm. So I ended up ordering another one from the manufacturer. Should be here later in the week. Much of the sealant should be more dry by then so it won't be as messy to work around the tank for next few steps.