I did think about it.
And it must be desasterous. And in my case, a 27,5 ft Parker, the cast-iron floorplate would drop as well. A case in Holland is known of dropping the keel through the bottom by cause of breaking the hoisting wire, and that was under quite normal, easy going, conditions. So not upside down. I did pose this question 1,5 year before but did not get an answer. The lifting wire of my keel was connected to bolt-eye of normal iron, not stainless steel, and was rusted and nearly broken. Inspectiob and repairing was just in time !! So be careful !
The builder did not reply on this issue but was pondering on some locking mechanism but did not work out a solution. I have seen other yachts with leftkeels, not Parkers, who used a solid stanless steel bolt through the casing of the keel with a close fit. So I am curious what solutions come forward of other owners.
Sjoerd
S,Voerman