Bill
we had similar issues on St Elmo's Fire. Port chainplate, forward vent area and cabintop
for the chainplate we removed the head, cut the interior plastic, removed the old wet core, throughly dried the area, then put epoxy encapsolated wood covered with mat for the interior and thickened epoxy to fill space and bond to the hull and bulkhead. replaced the interior plastic. result seems to be if anything stronger than original. used West System as familiar with their product. key seems to be drying area and bonding repair to existing structure. cabin top and vent area was done the same with good results
