Harken 7412.13 12V MKIV Electric Jib Reefing & Furling - Manual (Page 14)

Assembly Top Foil
Deburr inside edge using rat-tail file.
Cut foil to length using 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 cutoff
piece and use a flat metal object
(i.e. metal ruler) to scribe top
line of foil.
14 MKIV Unit 2E, 3E