Nice video, noticed the top two panel at the leach looked really loose, on my Aerotech Freespeeds I only rig that way if the wind is in the top range of the sail, normally I have those panels tight. And in those wind conditions I would use my 7.2 with no looseness in the leach.
I like to sail with the top of the sail open, this leads to better acceleration even if in the wind I lose a little in the low range