I almost forgot to tell.Imade a hatch seal and a simple way to lock the hatch down and best of all it does not leak at all i left it in the tub to test it.I also made a pushrod boot from some fuel tube and another small ring around it to seal it around the pushrod .It works great and made from scrap.
I tapped some alum 3/8 rod i cut in small "logs" and i epoxyed some 3mm screws ti the lip around the hatch.I put the cockpit on tighten the aluminum thingys and seal the hatch.The sealing gasket is weather strip for cars and trucks from the auto store it is about 3/4'' wide and about 3/8'' thick it feels like rubber but compresses it is a bit firm to compress so i superglued it around the inside of the lip leaving about 1/4'' above the lip so when the cockpit is tightend down it doesn't have to compress as much,the pics tell the story better.