My gut instinct was 6.2 or 7.0 but I wanted to get my 5.5 dialled in a bit better but it was just too light to really get lit up on the 5.5 so I only had one half decent run once my tuning was sorted, lots of variability in the angle and wind strength made it hard work but Jean-Marc made it look easy!.
After a couple of squalls I was cold and quit but i suspect that the best conditions came later after I had left.