zebras said..
Depends on how you ride. If you want to progress with more tricks and jumping and want to become better at pumping the wing and the board -> go for the 80. If you don't want to work as hard to get on foil in very light conditions -> 90.
I'm 72kg and use a 70L midlength. I'm foiling in similar conditions sometimes (lake,fluctuating and gusty winds, often marginal conditions). With that board and a 4M Wing i can get going at around 6-8 knots by pumping very hard. Basically as soon as the wing flies on its see that own i can yank myself up onto foil. It's all a question of technique and how hard you want to challenge yourself. :-)
Let's see that.
