On my Prindle 16, I have one reef point, which is about 1/3 of the way up from the bottom. It's basically three grommets in the sail. I attach the outhaul to the grommet at the leech, which becomes the clew when it is reefed.



I roll up the bottom of the sail and use line through the three grommets to hold the roll together.



So I suspect you wouldn't need much more than a few grommets in your sail.



Jonathan