Wondering if anyone could let me know if I have tell-tale signs of a mast step weakening. See attached picture. There's some bulging under the mast bore on the underside of the hull. Is this normal? Just an old hull (late 1970s or early 1980s)? Should I be worried about this? I didn't notice this when I bought the hull 6 years ago. I noticed this last year so I figure whatever is going on that the condition has progressed.