Looking at buying a mid 70's E29, but it has a lot of cracks around the mast step. They may just be the gel coat, not sure how deep they are. Is this a major issue? It looks bad but is not spongy when I step in the area. It also has a leak under the windows, just above the shelves in a very heavy rain, current owner thinks it is from the grab rails on the deck, so that water is leaking through the mounting holes and comes out where it looks like the hull and deck seam meet.