Hawaiis, my typical conditions are 10-17 light days. 15-25 windy days and sometimes 20-30+.
What's the sweet spot with a 9m edge and a race board?
You will probably be able to ride the race board with a 9m from 14 or 15 knots, but that's when I move to a twintip. In under 15 knots, the water is nice and flat so you can fly around on the raceboard and have a ton of fun. After 15 knots (depending on your local conditions) it gets pretty choppy and it's hard to keep your speed up. You can ride a raceboard in higher winds, but it's not much fun.