A good person to talk to is Skip Elliot. It seems that the old hobie kites were 1, too full and 2, hard to jybe in a blow.
The tornado guys found that one could get to the leward mark as fast buy sailing hotter angles. And do it without sailing through the sail everytime they jybed.I sail in SF Bay and so I have the 270sq ft It works well for me. Hope this helps.