Wayne, that would be a proper job. Unfortunately, the bolts are
unconventionally glassed over. In fact they are almost impossible to
locate and must be countersunk into the thick GRP hull. Although a
surgical approach would be a possibility, GRP lockers are built over
them on the starboard side, and the wooden galley and pilot berth on
the port side.

Thus it is not surprising to find no reference in the literature to
this kind of approach. That's why I believe an external patch-up job
is needed.