A friend of mine has a 1979 O'Day 28 that has a perplexing leak. He recently replaced his saildrive with another one and has no leaks around the mounting area. But somewhere between the motot and aft of the keel he has a leak that is collecting in the bilge. He has narrowed the source to this area.We can't seem to locate any keel bolts and are wondering if the O'Day 28 had the keel attached by someother means.