Hello all. My name is Robert and I hail from California's central coast. I'm looking at purchasing a 1977 O'day 20 with a shoal keel. The boat has no trailer and will need to be moved. Can someone please post a pic of the trailer they are using so I can see what I'll need? I don't know how deep the shoal keel is, and don't want to show up with the wrong trailer. Any help would be greatly appreciated. Thanks.