Cleaned out the sump. Squeegeed raw epoxy of the inside of the lid, put a 1 x 4oz patch over a dubious looking bit. Painted raw epoxy over the mating surface, and a bead of flox over the t-hats. I tried the piping bag for the flox, but it was terrible, and left heaps in the bag. I went back to using my miracle squeegee, cf credit card.
Installed the sump tank lid, clamped aft with cleco and weighted elsewhere. Satisfactory squooge observed.
You may notice a subtle change in my hair color, it was a gesture of solidarity to my students for their success in a tricky assessment at work.