For me it would make sense to make the F20 rules the dimensions of the N20 or Tornado considering that they're the only 20' boats with any critical mass and active racing. With the turmoil in the Tornado class and its pseudo-olympic status, I'd say that if the F20 class were to be "revived" then we need to say "ok, F20 == N20 specs" and then choose where we want to maybe make some alterations.

Could the N20's out there go on a diet and lose some weight economically?