Thanks for the replies and in particular to the link for jake's site.

I hadnt thought about the origin of the boat but we are in Singapore so I would guess Australia is most likely. If nothing else at least the ambient temperatures here should help with curing times..!

The top deck leak is behind the main beam but before the shroud. It seems very rigid and cant be lifted.. for the moment at least. Each hull has one inspection hatch which is on the deck about 6" forward of the stern.

For the daggerboards we will probably attempt a repair first from outside the boat. We will save cutting in extra hatches for plan B when that doesnt work.!