Steps sealed and installed. Used red RTV sealant rather than the hideously messy tank sealant.
Step floors and nutplates installled - page 21-18 and 19.
P 21-20Installed system block studs - horrible job as the lock nuts are so tight. Used Boelube to ease them. Very awkward access here - it would have been easier to install them on the belly skin before that was attached. Can't see any reason not to.
Section 21 complete! Started on edge prep and deburring and countersinking parts for Section 22.
