From what I can see the 14sq is based on the 4.5, a skeg not a dagger board hull.

In extremely simple terms, to get rid of weather helm, you want to match the center of effort(Ce) to the center of force(Cf) of the sails. The Ce is the point along the hulls where the average effect of the rudders, skeg, sides of the hulls to resist lateral movement is located. If the Cf is aft of the Ce you get weather helm.

With skeg hulls the Ce moves around a lot. The side of the hulls, especially the sides of the bow on NACRA's, act like keels. With the bow down the Ce moves WAY forward. When you rake the mast back and move your weight back, the Ce moves back faster than the Cf.

If I am right, the weather helm should come back if you move your weight forward, at least this is my theory.

I don't know if the theory is true but I have found that on Waves and my 14, get the bows up and the weather helm goes away. On my 14 I found if I hiked really hard on the back corner, I could pull the bow up and sometimes even have lee helm for a few scary seconds.