[RidgeRunner]

It turned out great. It should offer more grip and strength than the Starboard.
AND The coring was done right IMO. Leaving the core just shy of the outside edge is a strength multiplier. The glass that gets put over that rounded edge and back up the lip forms a much more robust design. Another advantage is upon screwing the lid down around the perimeter, no screws will be into the core. You just want to make sure the hatch face is thick enough in that area to be able to easily countersink the screw heads. That is where Whaler has screwed up on their lid and hatch design IMO. They run the core to the outside edge and then proceed to fix brass nuts in place to be fancy then the back side of every lid is glassed over and gelcoated. They rely on caulk around the fasteners to keep the water away from the core, same holds true with keeping water away from the foam sandwich construction in all the thru hulls.
It looks nice and foo foo having a slick gelcoated back on all the hatches like the Whaler lids but several lids failed at about the 6 year mark due to their construction techniques. I built my hatches like yours and they are already older than that ,still perfect.