My forehatch has developed a leak. After investigation, it appears to coming in under the flange attached to the deck. The boat is 1990 and I guess the sealant has dried out. Is it screwed down or bolted? If bolted it looks as though I’ll need to remove the headlining which as I have found out is vvirtually impossible without a major rebuild! I was hoping to be able to reseal it easily but I’m now a bit sceptical. Advice would be much appreciated.