The draft now is at 40% and i not consider the wingmast ..... i think that if the draft move to 30% the sail perform better ..... or not ?
The wingmast is part of the airofoil and must be considered. If it is a 10% wingmast, the airfoil draft is at 50% and moving it forward should be beneficial.
Still, it depends on other factors. Best thing to do is check the draft position of the regatta winners in your class.
A few relevant questions:
What boat is it?
Does the jib overlap?
Do you use a downhaul? Is it powerfull enough?
How old are your sails and of what sailcloth?
Are the battens not tappered at all or you just plan to increase the tapper?
