Sorry, that looks pathetic. My keel is a cassette retractable and the fin shape enlarges to a rectangle from the fin and goes up 2' into the hull under the nav seat. It has two large bolts holding HDPE or such as a way to keep it from falling out. My fin is carbon and structural from edge to edge with minimal fairing. And please tell me those hollow keel floors are tabbed, not just bonded down.Keel socket laminated as part of the hull.