The hull is heaps strong enough to take the weight of the yacht no trouble at all.
The Bav Match keel issue is well documented

You do need to routinely check the tightness of the keel bolts. I do mine every second haul out. When we first purchased Sweet As, I don't think the previous owner had done it for a while, if at all. The attached pic tells the stripy when we first hauled her out.
A 30mm long throated socket with a long handled torque wrench is all that is needed. Using a little machine oil on the thread as you unwind and wind up the locking nuts avoids the stainless steel binding in the thread.