Deburred, flanged and fluted the ribs and then assembled the tank in the cradle. This took way longer than expected as you have to force the ribs into the thick skin to get the holes close enough to insert Cleco's.
I then installed the tank on the wing and ensured that it was perfectly aligned. Its amazing how well this kit fits together - absolutely no gaps anywhere.
With the tank perfectly aligned I match drilled the inboard Z-bracket with a 12" drill bit + drill stop!
I then removed the leading edge to gain access to the outboard Z-bracket and drilled it as well.