Pete, the point is that the rules permit a certain amount of tinkering. T foils already exist within the class, AFAIK no one has yet added wings to an existing (underwidth) design but the rules do allow for it. It would be interesting to see whether this "self-cancelling advantage" purported under the rules actually works?
I'd love to see a T4.9 (or Mozzie) sporting wings which extend aft of the transom and whether the boat is then faster as a result?
Of course, learning to steer the thing downwind, in a blow, with a kite up, while trapezing from aft of the transoms will be interesting to say the least!!