I purchased the boat 4 months ago and recently dived on her and discovered quite a bit of rust where it looks like the keel has dropped a bit and allowed water to get in. There also seems to be a flange that aids in supporting the keel near the leading edge that also has a rust line conforming to its edges. And the filler or bondo that smooths over the top of that flange seems to be wiggleing a bit. Is this common? Is it a simple fix? Has anyone had this problem? Help. Andy