I am re-doing the repair to the deck in the cockpit. It didn't look good and still flexed too much. When I had a closer look, the crack went right to the edge of the hatch opening. So I cut out a much larger area and started gluing substantial 12mm plywood beams under the edges. The deck around the hatch is very solid now, and when the infill goes in, it should be far better. Looks terrible at the moment.