I know this subject, or better, leaking hatches, was already addressed to some extent.
I have B41 2003 the two main Lewmar hatches are 556 mm square, which seem Bavaria specials ( go figure why they did not use the 60 size which is less than 1in bigger. Must be to be special=more $ ).
The replacement seals are of course very expensive, on top of it lewmar calls them Low profile (25mm). I measured 32mm which is Medium profile. Here are my questions:
a. Do the MP and LP use the same seals
b. Did anyone found the manufacturer of these seals to get them by foot at reasonable price
c. Are the corners vulcanized or just turned around acrylic
Many thanks