Thanks for all the advice. I measured 9.5" square and like the idea of the drop in Bomar Low Profile Black Molded 9.5"X9.5" Cutout at Hamliton Marine $147.99.
But I could be tempted by Lewmar 10 Series Low-Profile Hatch, 10 1/4" x 10 1/4" Cutout for $195.95 at Star Marine Depot. We have the larger version of this hatch on the bow. I'm just afraid it requires cutting. Even with the durability it's hard to justify the Lewmar Ocean for $100+ more than the low profile for that location though if I had it to do over I put one on the bow.
