I like to think that im a fairly fast sailer being able to keep up with standereds, when in a blow, however once it drops bellow 10knots I cannot keep up with the sloest radials. any heko would be apreceated.
Outhaule is set on both up and down wind to a hand at the boom cleat. My vang is off completely downwind and is on enough to great a leach and remove slack when upwind and on reaches as well the downhaul is always off
try letting off the out haul more, especially reaching/downwind.
Other than that, in light wind, you need a very good reason to move the tiller. Keep the boat stable, raise the center board a bit(?) and in really light stuff heel the boat a bit to leeward so gravity can shape the sail when the wind cannot.