I recently put my recently purchased Hunter 25 (1976 Vintage) on land for some repair work - when I sat it down on the keel (fixed) - the floor buckled up inside the boat toward the back of the keel - there appear to be some fiberglass supports that are broken in the floor - whats the problem? Does the keel need to be removed for the repair? What caused this? Any repair methodology suggested. I am faily new to sailboat repair but an old hand at fiberglass and plan to do the repair myself. Any pitfalls I need to be aware of?Thanks for your help - Jeff