Ocean, i have now the fat lady v2, and had also the v1. And for me, i dont want a kite only to ride from one side to the other, but that its me, if you want lw kites, you have royal with 19m, and some 21m foils, and those kites are for LW, BUT , they are not that funny to ride.
I am 1.98m and 98 kg, and i can ride with a 6.1 surfboard since the 8/10 knots, but i can have a lot of fun riding, yesterday i was riding with 10knots and i was doing some overhead waves and going upwind withou any problem.
In your compare with the fat lady, you didnt tell one thing, first you have 2 more meters comparing with the fat lady, you had a light wind board, 149x?????. And what is your weight and from the fat lady rider??
And if the wind picks up to 18/20 knots while you are in the water?? Do you can handle the core??? You can be sure that you can handle the fat lady.
And about light wind claims from anyone, it dependes a lot in other factors, like current, density from the air, board, if the rider is heavy or not, how many meters in the lines???
So i think this is always a subject to discussion...