My M-17 Sunflower has been at the spa for a bit of an overhaul. Photos and narration are available at the following link: http://msog.org/how-to/centerboard/cbrepair_johnson.cfm
There are detailed photos including the centerboard completely removed, as well as some insight as to what goes on inside that keel/centerboard rig. Click photos for greater detail. Extra thanks to Doug King for providing such a wonderful website.