Interesting...

My boat actually has a lip that goes around the top and the bottom of the daggerboard wells. It is about a 1/4" thick and about 1" tall (as tall as the carpet). This is not a fairing, the carpet edges are still exposed (and there is still some slop to the board) so I don't think it was added by a previous owner. For reference, my boat is a '99. maybe they changed the cases after that.

Just thought I would share what I have seen...

cheers.