Just an hour or so to clear up the edges today. I might fiddle a bit more around the back of the nutplates just to be sure nothing is going to flake off in later times.

I will probably use ‘Stag’ joining paste for the permanent/temporary seal

While heavier than I would like (of course) I think this is going to be strong enough to stand on and 100% leak proof.

That’s the major part of this until the strakes are done and I get to seal the hatch for real.

Underneath

Top view of hatch

In place (no screws)