Hi Enrico, yes a smaller board will complement your JP120 ideally. Given your weight I would not recommend smaller than 100 L so that you can start using it in some 20 Knts. Then you have to select the best sail for the day. I agree that 4.7 sounds a bit small with 100 L, and certainly too small with 120. Design and tuning play their role as well. Some sails seem to pull like tractors - so the easy waterstart - but have very poor lift and do not work well upwind. This can be fixed by proper rigging to some extend. Check the program of the Core before considering to change. At l'Almanarre you can also start from the right side and gain some angle. I wish you a windy 2010.
Last edited by Farlo; 8th January 2010 at 12:14 AM.