That's the big drawback to any -fixed- foils, front or rear, you cannot adjust the angle of attack so if you do go "nose down" you're going to go VERY nose down if it's on the front, or get a ton of drag if they are on the rudders.

I was not having a problem with nose diving at the NA's, as long as I saw the big puffs coming and bore off deep before they hit, ease the spin sheet out, etc. It was only when I overstood the gate and was trying to keep up high in the gusts that I was stuffing it to the mast.

BUT...Boca Ciega Bay is small and very lake like, we were not sailing downwind in big waves like you would have at any open water venue in 20knots of wind. I'm not sure T foils on the rudders would "save you" when surfing down a big wave anyway, you are going to stuff it to the mast when you hit the wave in front of you, no matter what!