Hmmmmm... ROLL TACK...couldn't have said it better myself!! In light air, you should release about 12" of mainsheet as you go through the eye of the wind. In windier conditions, release from 18" to 24" so you can complete the tack. Remember when the leech sees the wind the boat will round up. This is why there is such a big ease of the main.
I used the same tuning tips for the Turbo. Opening the slot with mast rake is a HUGE benefit!
Bob