Just to clarify:
Are you saying the exterior of the keel was glassed over, closing the centerboard slot? With the board still in place?
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)