I noticed that you have your boards up a little. Do you only leave them completely down off the wind in light air? My understanding with the Blade is that you start to pull them up when you're starting to trip over your toes off the wind in decent breeze.
My boat has longer boards than most (approx 1m projection below the hulls).
They stay fully down until about 12kts; I then slowly raise then a little as the wind comes up; over about 20 I have them about 2/3 down which is a about the same as a standard Stealth. Once in real survival conditions I bring them up a bit more; maybe 1/2 up.
