Thanks DURACELL, it's a different view. There is a small misunderstanding, when i mentioned the bumpy nose was in choppy water, not really flat. In this case (flat) i need more speed, but in choppy water i loose the stance because the board moves so much.
Maybe part of it is a technique issue, but could it be also improved with another board?
Also, in the case of the Carve which fins do you recomend?