Harken 7410.10 MKIV Jib Reefing & Furling - Manual (Page 11)

Assembly Top foil
Deburr inside edge using a rat-tail file.
Cut foil to length using a hacksaw.
Prepare top foil for drilling.
Tip: Mark top foil to distinguish
from cutoff piece.
Scribe line on top of foil to mark drill
holes. Lay top foil alongside cut-off
piece and use a flat metal object
(i.e. metal ruler) to scribe top
line of foil.
MKIV Unit 0 11