First day testing new Firewing 5.2 MkIII. Not quite enough wind to really get a top speed, but sail felt very fast. Looking forward to another 5kts of wind to see how far it can go. Swapped to the speed board for a few runs at the end, but didn't make too much difference. Top speed peak was actually better on the slalom board. 10s average was better on the speed board. I think it was more to do with the gusts though.