Light air DDW making 1.8 maybe 2 Kts our 155 was basically just hanging, to be expected. As a bigger Boat passed (38 ft) we noticed his head sail was more or less backwinded, it was like the Boat was going faster (just a little) than the sail. We slowed just a little by dropping the pole pulling the sail in, so the faster trim was to let it back just that little. Any suggestions on filling it up? Main in to funnel some air into head sail? We got a unique look into our trim from the other Boat.