I just bought the 371, Hull 30 in Norway and sailed her to the Flensburg area. We are still “tight and dry” around the portlights. Have your found a solution for the problem? Do you know where to buy spare portlights? I plan to exchange all hatches. The former owner has already done quite extensive technical upgrading, but also redesigned parts of the cabin.
We have replaced all portlights last year. Contacting Najad and received the information that HR replacement portlights come closest. Najad does not offer any replacements and do not work with the old supplier from US anymore.
The new portlights have been installed and work great. Small trouble: they have not exactly the same size. The new portlights are slightly smaller at the corners. So we had to use some filler creating the perfect cutout size again. That just 2-5mm. But it’s important to ensure the full compression of the gasket strip. Still it was more time consuming then planned but works well.
Please let me know if you have more questions.
See below picture from the outside indicating the small difference: