I have 10,5 and 8,5. With 10,5 set to Hi I can go up to 30 knots without any problems. But I have problems with 8,5. When is set to HI, the kite seem to be owersheeted alot. Does mean, when pul the bar totaly, kite falls to powerzone. I have changed small extension o kite.Short extension is now in p...