The cockpit drain on the starboard side was rebuilt when the rotten section of the transom was replaced.
The picture below shows the holes in the transom on the port side. As you can see the thru-hulls expose the balsa wood. If the thu-hull seal is faulty then the water is going to get in. These two are dry and solid but I will be grinding out about an inch of balsa around the hole and filling with thickened epoxy which will:
1) seal and protect the balsa wood
2) The epoxy will not let the thruhull compress the balsa wood
A picture of the port side with solid epoxy protecting the balsa wood.