With your weight of 80 kg, it is much better to choose the IS87 or even the IS80 with 5.2 and 6.2 sails.
I'm 87kg and I use regularly a 6.7 on my IS87.
5.7 is my smallest sail on the IS87.
Beyond this, I'm on wave equipment.
IS87 / IS101 / IS122 / US147
Last edited by BelSkorpio; 30th July 2013 at 04:30 PM.