A question for Rob ...
I have a Mark 3. If I cut the galley moulding on the starboard side down to the height of the forward berth, would I need to put a stiffening rib or two down the inside of the hull from the gunnel to the top of the berth?
Structurally there is no reason to be concerned about cutting the galley down to the berth height, as there is a significant compound curved area there and it will be quite rigid, but just be careful not to break in to the laminate. For your own protection don't forget to use a dust mask when cutting and grinding.