I did only near (and into) the stems. It strengthens the joint and makes glassing easier. Don't go overboard on the size of the fillet. The amount left by the curved end of a tongue depressor is plenty.

: I noticed that "One Ocean" website recommends a fillet of epoxy
: filler for the inside keel line prior to glassing the hull interior.

: Is this step recommended for a Guillemot?

: Thanks for the advice.