Hi, i have a little bit problems with very windy conditions.. some people say that i need set roll gain very high, like 110-120% and some people say i need to get lower number.. like 70%.

If i want a smooth operation in windy weather, is the right settings to roll 70% or 120% ?

Gains will help when there is no Input from the sticks, say in windy weather in a hover.  Gains are the reaction of the Aircraft from external forces , mostly wind, and  in a small part pressure.  

So in windy weather I would Increase the gains but if it start to  act to Aggresivly ( When I flew RC  Helicopters we would call this "Hunting " ) then back down the gains.

This has been my experience.

Remeber to lower the gains when conditions are calm.