Now you can install the mainsail. First knot the head with a minimum distance to the prepared
string in the top of the mast. The upper edge of the sail should not be more than 5 mm below
the boom. Next, fix the rear end of the sail (clew) at the end of the boom (yardarm) between
the two silicon rings. To do this you may need to tilt by rotating the pressing-down the mast
slightly upwards. Loop the cord attached to the sail once or twice around the mast and put
the knots so that the lower edge of the sail (leech) is still 2 to 3 millimeters above the silicone
rings.
Now turn the press-down again so that the rear edge of the mainsail (leech) has just a very
slight tension. At the press-down should have on each side about 4 mm free thread visible. If
necessary, loosen the retaining screw on the clamping bracket and move the stop point ac-
cording to the boom. You should fix the clamping angle into its final position with a drop of
cyano or a tape winding against slipping to the boom yardarm.