I started cutting out the foam for my 13ft, 2in skiff and I having a dilemma. This being my first project I am a bit over my head in certain areas, hatches being one of those areas. Buying hatches would run about $270-$300. Hinges, glass, closures and paint would cost about half. The problem is I have never made a hatch. Trolling through these threads I have noticed that there needs to be a lip on the under side of the deck to support the hatch. I am not sure how to make that. Also, where do I get and how do I install the black rubber gasket to make the hatch water resistant? Thanks in advance for your help.