Folks I understand that there's a cavity in the keel under the bilge of Mark 1 Vegas (mines a 1969). Does anyone know if this cavity is balsa cored or of other composition? The moisture reading is high over this area and I was hoping someone could suggest a way to reduce the moisture inside. I was thinking of drilling a hole near the bottom of the keel to drain any moisture but wasn't sure of the best place to do this. Has anyone else done this? I wanted to seal up this hole so that I could open it again when drying out over winter but worry that any drain plug fitted might let more moisture in. Any ideas much appreciated, Jeff