The Stealth with T Foil rudders is VERY tolerant of gusts downwind and will accelerate very quickly without burying the bow. BUT, when (if?) the T foils let go, they let go with no warning at all!!!
This particular capsize happened because I was already dealing with quite a large gust when I got hit by a further gust and didn't react quickly enough with dumping the kite. The rudders must have already been very close to their limit of grip on the water...............