I used the square hatch.
Hello all, I used the square hatch on my H25. It was a Lewmar Ocean 60, and is available through most marine stores (West Marine, Boat/US, Boater's World, Defender, etc). Lewmar makes 2 versions of this hatch- one with a flange that fits into the hole in your deck (if the hole is square...), and the other without a flange which can be mounted flat to the deck surface. I used the flat version (as the flange won't fit into the trapezoidal hole). All of the hardware on the hatch fits into the hole in the deck rather nicely. The project took me about 2 hours to complete, although I must admit I didn't do my best work on this one- I was more interested in stopping the leaks than getting it to look good. I'll post pictures of my finished work soon.--Jon BastienH25 'Adagio'