Congratulations, your charts are great!! Just one comment, I find your 1.05 / 0.95 ratio for fin surface and length in under / overpowered conditions a bit conservative. My practical findings suggest me something around 1.1 and 0.9 respectively. But I'm a lightweight sailor and this may play a role (1 Kg = 2.2 Lb). Best regards and good luck for your doctorate.