. First, I put a single latch in the middle of the hatch (similar to original). Worked well, but it wouldn’t really dog down the hatch because of the curve of the hatch coaming.
Next, I put a catch on each end, but the hatch stay hit the port side catch so I moved it slightly inboard. Well, that worked, but it put everything under strain and it was ugly. I changed the style of catches from the lever type (no adjustment except to reposition the catches) to the the screw down types. Works lovely, but ow I have 18 unused holes in the hatch coaming and nine in the hatch itself. Using a piece of western red cedar, I fashioned a nice shape to go all the way across. Should look good and work well.
Here is the holey lid . . .