Now that the gangplank has dried, it's time to install all the fittings.
The stanchion bases were bedded with 3M 4200 to allow difficult removal should the need arise. The opposite side was properly supported by the backing plate along with 1in washers and locking nuts. The through bolts were tightened down and the excess was exuded.
The excess was then cleaned up with acetone, and left to cure for a few days.